BIO110 - Module 3 Homework Study Guide

What is/are the most important output(s) of glycolysis? A)---- 2 net ATP molecules B)---- 4 net ATP molecules C)---- 2 pyruvic acid and 2 NADH molecules D)---- carbon dioxide E)---- 1 glucose molecule

C)---- 2 pyruvic acid and 2 NADH molecules

BioFlix Activity: Cellular Respiration -- The Stages

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BioFlix Activity: Cellular Respiration and Photosynthesis -- Energy Flow

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BioFlix Activity: Photosynthesis -- Inputs and Outputs

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BioFlix Activity: Cellular Respiration -- Inputs and Outputs

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In the absence of oxygen the net gain of ATP for each glucose molecule during glycolysis is approximately __________. A)---- 2 ATPs B)---- 4 ATPs C)---- 38 ATPs D)---- 0 ATPs

A)---- 2 ATPs

Plants require specific inputs to carry out photosynthesis and cellular respiration. Which of the following statements accurately reflect(s) what plants must take in? A)---- Plants take in both carbon dioxide and oxygen. B)---- Plants take in carbon dioxide from the air. C)---- Carbon dioxide enters plants from the soil. D)---- Plants take in oxygen as an input for photosynthesis.

A)---- Plants take in both carbon dioxide and oxygen. B)---- Plants take in carbon dioxide from the air.

Cellular respiration accomplishes two major processes: (1) it breaks glucose down into smaller molecules, and (2) it harvests the chemical energy released and stores it in ATP molecules. By the end of _____, the breakdown of glucose is complete; most ATPmolecules are produced during _____. A)---- glycolysis ... the Citric Acid cycle B)---- the Citric Acid cycle ... glycolysis C)---- the Citric Acid cycle ... electron transport D)---- electron transport ... glycolysis

C)---- the Citric Acid cycle ... electron transport

Which part(s) of cellular respiration require(s) oxygen gas? A)---- Citric acid cycle B)---- electron transport chain C)---- glycolysis D)---- A, B, & C E)---- A & B, but not C

E)---- (A & B, but not C) the citric acid cycle and the electron transport chain NOT glycolysis

What is the correct general equation for cellular respiration? A)---- C6H12O6 + 6 H2O → 6 CO2 + 6 O2 + ATP energy B)---- 6 O2 + 6 H2O + ATP energy → C6H12O6 + 6 CO2 C)---- C6H12O6 + 6 CO2 → 6 O2 + 6 H2O + ATP energy D)---- 6 CO2 + 6 H2O + ATP energy → C6H12O6 + 6 O2 E)---- C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP energy

E)---- C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP energy

Which of the following processes takes place in the cytosol of a eukaryotic cell? A)---- acetyl CoA formation B)---- electron transport chain C)---- citric acid cycle D)---- ATP production by ATP synthase E)---- glycolysis

E)---- glycolysis

In muscle cells, fermentation produces _____. A)---- carbon dioxide, ethanol, NAD+, and ATP B)---- lactate and NADH C)---- carbon dioxide, ethanol, NADH, and ATP D)---- pyruvate E)---- lactate and NAD+

E)---- lactate and NAD+

Most of the ATP production during cellular respiration occurs __________. A)---- during glycolysis B)---- from activity of the ATP synthase machine C)---- during the citric acid cycle D)---- from the addition of electrons to glucose

B)---- from activity of the ATP synthase machine

BioFlix Activity: Cellular Respiration -- Food as Fuel Drag the labels onto the flowchart to indicate how food molecules reach the body's cells and fuel cellular respiration. Start with the ingestion of food on the left.

A)---- Eating food provides fuel & building blocks for your body B)---- After food is broken down in the digestive system, it is transport to cells via the circulatory system C)---- Fuel molecules are broken down further in glycolysis & the citric acid cycle (aka krebs cycle) D)---- ATP is produced with the help of the electron transport chain

BioFlix Activity: Cellular Respiration - Cell Work Part A. Which of the following molecules is broken down in cellular respiration, providing fuel for the cell? A)---- Glucose B)---- ATP C)---- Water D)---- O2

A)---- Glucose

Unlike the Citric Acid cycle and electron transport, glycolysis occurs _____. A)---- in the cytoplasm B)---- directly on the surface of the mitochondrial membrane C)---- within the mitochondrial membrane D)---- within the cell nucleus

A)---- in the cytoplasm

NADH and FADH 2 are important in cellular respiration because they deliver high-energy electrons to the electron transport system. Electron transport produces _____ ATP molecule(s) per NADH molecule and _____ ATP molecules(s) perFADH 2 molecule. A)---- three ... two B)---- two ... three C)---- one ... one D)---- zero ... zero

A)---- three ... two

At the end of the electron transport chain the electrons are taken up by oxygen to generate __________. A)---- water B)---- heat C)---- ATP D)---- glucose

A)---- water

What is the role of oxygen in cellular respiration? A)---- Oxygen provides high-energy electrons for transfer to glucose. B)---- Oxygen accepts high-energy electrons after they are stripped from glucose. C)---- Oxygen is required to convert ADP to ATP. D)---- Oxygen is involved in the initial breakdown of glucose to pyruvic acid.

B)---- Oxygen accepts high-energy electrons after they are stripped from glucose.

In electron transport, high-energy electrons "fall" to oxygen through a series of reactions. The energy released is used to _____. A)---- synthesize ATP directly. B)---- transport protons into the intermembrane space of the mitochondria, where they become concentrated. They then flow back out into the the inner compartment (matrix) of the mitochodria. On the way back, protons turn ATP synthase turbines and produce ATP. C)---- transport electrons out of the mitochondria, resulting in ATP production. D)---- move phosphate groups into the mitochondria. When they reach a high enough concentration, they spontaneously join with ADP to form ATP.

B)---- transport protons into the intermembrane space of the mitochondria, where they become concentrated. They then flow back out into the the inner compartment (matrix) of the mitochodria. On the way back, protons turn ATP synthase turbines and produce ATP.

Which statement describes glycolysis? A)---- This process joins 2 pyruvic acid molecules into a molecule of glucose. B)---- This process uses energy captured from electrons flowing to oxygen to produce most of the ATPs in cellular respiration. C)---- This process splits glucose in half and produces 2 ATPs for each glucose. D)---- This process converts pyruvic acid to acetyl CoA. E)---- This process produces some ATP and carbon dioxide in the mitochondrion.

C)---- This process splits glucose in half and produces 2 ATPs for each glucose.

Virtually all organisms on Earth use cellular respiration to produce ATP from sugar. ATP is then used to power cellular work. Which of the following is the correct equation for cellular respiration? A)---- sugar + O2 → CO2 + H2O + ATP B)---- ATP + H2O + CO2 → O2 + sugar C)---- sugar + CO2 → O2 + H2O + ATP D)---- sugar + O2 + sunlight → CO2 + H2O + ATP

C)---- sugar + O2 → CO2 + H2O + ATP

Learning through Art: Chloroplast Structure

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Learning through Art: Organic Molecules as Fuel for Cellular Respiration

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Learning through Art: The Calvin Cycle

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Learning through Art: The Light Reactions

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1. How many more calories would a 240-pound man need to consume than a 170-pound man to maintain a constant weight? A)---- 70 calories B)---- 100 calories C)---- 300 calories D)---- 2000 calories 2. Which two statements about basal metabolic rate are true? A)---- The basal metabolic rate determines exactly how many calories to consume each day. B)---- If you exercise vigorously, you will need to consume fewer calories than your BMR suggests to maintain a constant weight. C)---- Basal metabolic rate includes the energy consumed by the body during cellular respiration. D)---- If you lose weight, your BMR will not change. E)---- If all other factors are identical, a person who weighs more will have a higher BMR than a person who weighs less.

1. C)---- 300 calories _______________________________________ 2. C)---- Basal metabolic rate includes the energy consumed by the body during cellular respiration. E)---- If all other factors are identical, a person who weighs more will have a higher BMR than a person who weighs less.

Which statement describes the electron transport chain? A)---- This process uses energy captured from electrons flowing to oxygen to produce most of the ATPs in cellular respiration. B)---- This process produces some ATP and carbon dioxide in the mitochondrion. C)---- This process joins 2 pyruvic acid molecules into a molecule of glucose. D)---- This process converts pyruvic acid to acetyl CoA. E)---- This process splits glucose in half and produces 2 ATPs for each glucose.

A)---- This process uses energy captured from electrons flowing to oxygen to produce most of the ATPs in cellular respiration.

Cellular respiration requires fuel (glucose) and oxygen gas. The main process that produces these inputs is _____. A)---- photosynthesis B)---- glycolysis C)---- citric acid cycle D)---- electron transport

A)---- photosynthesis

BioFlix Activity: Cellular Respiration - Cell Work Part B. Which energy-rich molecule produced by cellular respiration directly powers cell work? A)---- Glucose B)---- ATP C)---- Water D)---- O2A)---- Glucose B)---- ATP C)---- Water D)---- O2

B)---- ATP

Which of the following statements is true about the way cells shuttle electrons from one molecule to another during cellular respiration? A)---- NADH is suited to pick up electrons. B)---- Electrons are added to NAD+, which then carries the electrons to another electron acceptor. C)---- Electrons are transferred through diffusion. D)---- Water acts as an electron transporter.

B)---- Electrons are added to NAD+, which then carries the electrons to another electron acceptor.

Select the correct sequence of steps as energy is extracted from glucose during cellular respiration. A)---- glycolysis → citric acid cycle → acetyl CoA → electron transport chain B)---- glycolysis → acetyl CoA → citric acid cycle → electron transport chain C)---- acetyl CoA → citric acid cycle → electron transport chain → glycolysis D)---- electron transport chain → citric acid cycle → glycolysis → acetyl CoA E)---- citric acid cycle → electron transport chain → glycolysis → acetyl CoA

B)---- Glycolysis → acetyl CoA → citric acid cycle → electron transport chain

From what food can reactants of glycolysis be derived? A)---- fats B)---- carbohydrates, fats, and proteins C)---- only proteins D)---- only carbohydrates

B)---- carbohydrates, fats, and proteins

ATP synthase is a protein machine that assembles ATP. What is the direct source of energy that powers this machine in the process of cellular respiration? A)---- fermentation B)---- flow of H+ C)---- sunlight D)---- heat

B)---- flow of H+

Glycolysis is the multi-step breakdown of _____. Several different _____ play a role in this process. A)---- pyruvic acid ... sugars B)---- glucose ... enzymes C)---- ATP ... complex carbohydrates D)---- glucose ... organelles

B)---- glucose ... enzymes

In what organelle would you find acetyl CoA formation, the citric acid cycle, and the electron transport chain? A)---- Golgi apparatus B)---- mitochondrion C)---- nucleus D)---- chloroplast E)---- lysosome

B)---- mitochondrion

Autotrophs use photosynthesis to convert the energy of sunlight into the chemical energy of sugar. Which of the following is the correct equation for photosynthesis? A)---- sugar + O2 → CO2 + H2O + sunlight B)---- O2 + H2O + sunlight → CO2 + sugar C)---- CO2 + H2O + sunlight → O2 + ATP D)---- CO2 + H2O + sunlight → O2 + sugar

D)---- CO2 + H2O + sunlight → O2 + sugar

In which organisms do cellular respiration and photosynthesis occur? A)---- Only consumers perform photosynthesis, and only producers perform cellular respiration. B)---- Only producers perform photosynthesis, and only consumers perform cellular respiration. C)---- Photosynthesis occurs in both producers and consumers. D)---- Cellular respiration occurs in both producers and consumers.

D)---- Cellular respiration occurs in both producers and consumers.

Which statement describes the citric acid cycle? A)---- This process converts pyruvic acid to acetyl CoA. B)---- This process splits glucose in half and produces 2 ATPs for each glucose. C)---- This process uses energy captured from electrons flowing to oxygen to produce most of the ATPs in cellular respiration. D)---- This process produces some ATP and carbon dioxide in the mitochondrion. E)---- This process joins 2 pyruvic acid molecules into a molecule of glucose.

D)---- This process produces some ATP and carbon dioxide in the mitochondrion.

If the amount of oxygen required by your muscles during a workout exceeds your aerobic capacity, your muscle cells will __________. A)---- stop getting energy until your breathing rate increases and more oxygen is delivered to your cells B)---- send a signal to the respiratory system to increase your breathing rate C)---- increase their capacity to absorb oxygen D)---- switch to anaerobic respiration and produce lactic acid

D)---- switch to anaerobic respiration and produce lactic acid

Which part(s) of cellular respiration take(s) place in the mitochondria? A)---- glycolysis B)---- the electron transport chain C)---- the Citric Acid cycle D)---- the Citric Acid cycle and the electron transport chain E)---- All of the above.

D)---- the Citric Acid cycle and the electron transport chain

Interpreting Data: Absorption Spectra and Photosynthetic Pigments Part A. Approximately what wavelength of light is best absorbed by chlorophyll a, the pigment that participates directly in the light reactions? A)---- 435 nm B)---- 525 nm C)---- 680 nm D)---- One cannot tell from this graph. Part B. Which wavelength of light is best absorbed by chlorophyll b? A)---- 400 nm B)---- 455 nm C)---- 540 nm D)---- 645 nm E)---- One cannot tell from this graph. Part C. You obtain the pigments called carotenoids in your diet when you eat carrots. Why do carotenoids appear yellow and orange? A)---- They absorb yellow and orange wavelengths best. B)---- Their line on this absorption spectrum is colored orange. C)---- They absorb blue/green light and reflect yellow and red wavelengths of light. D)---- One cannot tell from this graph. Part D. Can you tell from these absorption spectra whether red light is effective in driving photosynthesis? A)---- These absorption spectra indicate that green and yellow wavelengths of light are much more effective than red light. B)---- One cannot tell from this graph, but because chlorophyll a does absorb red light, we can predict that it would be effective in driving photosynthesis. C)---- Because the absorption spectra of the pigments are highest in the purple/blue wavelengths, we can assume that red light is not effective. Part E. If only chlorophyll a were involved in the light reactions, would blue light (wavelength about 490 nm) be effective in driving photosynthesis? A)---- The peak absorption for chlorophyll b is close to this wavelength, so we can predict that blue light would be effective. B)---- The graph indicates that chlorophyll a absorbs very little blue light, so we can predict that blue light would not be effective. C)---- One cannot tell from this graph. Part F. An action spectrum plots the rate of photosynthesis at various wavelengths of visible light, and it shows that blue light with a wavelength of about 490 nm is effective in driving photosynthesis. Based on this information and the absorption spectra shown at left, what role may chlorophyll b and carotenoids play in photosynthesis? A)---- Because chlorophyll a is found in the reaction-center complexes of both photosystems II and I, we can assume that these other pigments play no role in photosynthesis. B)---- These pigments are able to absorb more wavelengths of light (and thus more energy) than chlorophyll a alone can absorb. As part of light-harvesting complexes in photosystems, they broaden the range of light that can be used in the light reactions. C)---- These pigments probably play only a photoprotective role (absorbing excess light energy that could damage chlorophyll a) and a role in producing the colors of fall foliage.

Part A. = A)---- 435 nm Part B. = B)---- 455 nm Part C. = C)---- They absorb blue/green light and reflect yellow and red wavelengths of light. Part D. = B)---- One cannot tell from this graph, but because chlorophyll a does absorb red light, we can predict that it would be effective in driving photosynthesis. Part E. = B)---- The graph indicates that chlorophyll a absorbs very little blue light, so we can predict that blue light would not be effective. Part F. = B)---- These pigments are able to absorb more wavelengths of light (and thus more energy) than chlorophyll a alone can absorb. As part of light-harvesting complexes in photosystems, they broaden the range of light that can be used in the light reactions.

Part A. In the solar panel system presented in the video, which of the following was necessary to generate usable electrical current for a home? A)---- DC power had to be converted to AC. B)---- The electrical energy had to be converted to nuclear energy. C)---- Electrical energy had to be stored in batteries for several days. D)---- The heat of the sun had to be used to generate steam. Part B. Which of the following best describes the energy conversion sequence in the solar panel system described in the video? A)---- Electrons, carrying energy from the sun, are focused by lenses onto wires, which carry the electrons as electricity. B)---- Electrons, carrying energy from the sun, are collected by thin chemical wafers, which concentrate the electrons to make electricity. C)---- Photons carrying energy from the sun chemically react with silicon crystals to generate a flow of electrons. D)---- Photons, carrying energy from the sun, are used to create steam that turns turbines to generate electricity. Part C. Which of the following would indicate that a home is using solar power to generate electricity and is NOT using batteries? A)---- There are solar panels on the roof and no power lines going to the home. B)---- There are water pipes running to and from the solar panels on the home. C)---- There are small plumes of smoke drifting away from the solar panels on the home. D)---- There are solar panels on the roof and power lines going to the home. Part D. If a home uses a large supply of solar panels to generate electricity, but has no battery system, surplus electricity that is produced is usually __________. A)---- released harmlessly into the ground B)---- released into the power grid for others to use, generating a credit to the homeowner C)---- used to pump water high up into a tank to store the energy D)---- used to power chemical reactions that generate water for the home Part E. Which of the following is a challenge to using solar-generated electricity in places not connected to a power grid? A)---- the limited supply of silicon to make the wafers used in solar panels B)---- the lack of efficient and inexpensive battery technology C)---- the generation of toxic fumes by the solar panel system D)---- the reliance upon fossil fuels to power the system

Part A. = A)---- DC power had to be converted to AC. Part B. = C)---- Photons carrying energy from the sun chemically react with silicon crystals to generate a flow of electrons. Part C. = D)---- There are solar panels on the roof and power lines going to the home. Part D. = B)---- released into the power grid for others to use, generating a credit to the homeowner Part E. = B)---- the lack of efficient and inexpensive battery technology

MP3 Tutor Session: Photosynthesis Part A. One of the important waste products of photosynthesis is oxygen gas. Where does this oxygen gas come from? A)---- Oxygen is released when carbon dioxide is broken down to extract carbon for later use in building glucose. B)---- Oxygen is released when water is broken down to extract electrons and protons for use in the light reactions. C)---- Oxygen is produced as a waste product in the form of cellular respiration that is used by photosynthetic producers. D)---- Oxygen is produced from breakdown of an intermediate product in the Calvin cycle. Part B. The light reactions produce _____. A)---- glucose and oxygen, completing the process of photosynthesis B)---- carbon dioxide C)---- oxygen, NADPH, and ATP D)---- several photons of light energy, which then power the dark reactions E)---- none of the above Part C. The thylakoid membranes bring together the components necessary to carry out the _____. A)---- light reactions B)---- Calvin cycle C)---- Krebs cycle D)---- production of glucose Part D. Incoming photons of light energy initiate photosynthesis by _____. A)---- exciting electrons in pigment molecules within the photosystems, raising them to a higher energy level B)---- turning ATP synthase turbines in the thylakoid membrane C)---- splitting water molecules into oxygen and high-energy electrons D)---- catalyzing a reaction that joins H20 with CO2, yielding glucose Part E. Which option properly summarizes the inputs and outputs of the Calvin cycle? A)---- H2O + light energy → ATP + NADPH + O2 gas B)---- H2O + light energy + CO2 → glucose + O2 gas C)---- ATP + NADPH + 3CO2 → G3P D)---- none of the above

Part A. = B)---- Oxygen is released when water is broken down to extract electrons and protons for use in the light reactions. Part B. = C)---- oxygen, NADPH, and ATP Part C. = A)---- light reactions Part D. = A)---- exciting electrons in pigment molecules within the photosystems, raising them to a higher energy level Part E. = C)---- ATP + NADPH + 3CO2 → G3P

Interpreting Data: Absorption Spectrum Part A. Imagine a plant with carotenoids but no chlorophyll. Which color(s) of light would be most beneficial to the plant? A)---- green B)---- violet-blue C)---- yellow D)---- orange-red Part B. Use the absorption spectrum graph and your knowledge of plant pigments to determine which three statements are true. A)---- The orange and yellow colors of fall foliage are mostly due to carotenoids in the plants. B)---- Visible light that is not absorbed by chloroplast pigments determines what color a plant will appear to your eye. C)---- A plant that contains chlorophyll a, chlorophyll b, and carotenoids will reflect more wavelengths than if it contained only chlorophyll a. D)---- If a plant absorbs light in green wavelengths, the plant will appear green to your eye. E)---- Different pigments in plant chloroplasts absorb light of different wavelengths.

Part A. = B)---- violet-blue Part B. = A)---- The orange and yellow colors of fall foliage are mostly due to carotenoids in the plants. B)---- Visible light that is not absorbed by chloroplast pigments determines what color a plant will appear to your eye. E)---- Different pigments in plant chloroplasts absorb light of different wavelengths.

BioFlix Quiz: Photosynthesis Part A. Which of the following equations represents photosynthesis? A)---- C6H12O6 + 6CO2 → 6O2 + 6H2O B)---- 6CO2 + 6O2 → C6H12O6 + 6H2O C)---- 6CO2 + 6H2O → C6H12O6 + 6O2 D)---- C6H12O6 + 6O2 → 6CO2 + 6H2O E)---- 6H2O + 6O2 → C6H12O6 + 6CO2 Part B. In which of the following organelles does photosynthesis take place? A)---- Mitochondrion B)---- Ribosome C)---- Nucleus D)---- Central vacuole E)---- Chloroplast Part C. What connects the two photosystems in the light reactions? A)---- A chain of glucose molecules B)---- A thylakoid C)---- Chlorophyll D)---- The Calvin cycle E)---- An electron transport chain Part D. What two molecules are produced by the light reactions and used to power the Calvin cycle? A)---- C6H12O6 and RuBP B)---- ATP and NADPH C)---- C6H12O6 and O2 D)---- G3P and H2O E)---- CO2 and O2 Part E. What provides electrons for the light reactions? A)---- H2O B)---- Light C)---- The Calvin cycle D)---- CO2 E)---- O2 Part F. What provides the carbon atoms that are incorporated into sugar molecules in the Calvin cycle? A)---- Sucrose (C12H22O11) B)---- Glucose (C6H12O6) C)---- G3P (C3H6O3) D)---- Carbon dioxide (CO2) E)---- RuBP Part G. What transports electrons from the light reactions to the Calvin cycle? A)---- NADPH B)---- Chlorophyll C)---- An electron transport chain D)---- FADH2 E)---- NADH Part H. The light reactions take place in the _________ and the Calvin cycle takes place in the _________. A)---- chloroplasts; mitochondria B)---- mitochondria; chloroplasts C)---- stroma; thylakoids D)---- thylakoids; stroma E)---- inner membrane; outer membrane

Part A. = C)---- 6CO2 + 6H2O → C6H12O6 + 6O2 Part B. = E)---- Chloroplast Part C. = E)---- An electron transport chain Part D. = B)---- ATP and NADPH Part E. = A)---- H2O Part F. = D)---- Carbon dioxide (CO2) Part G. = A)---- NADPH Part H. = D)---- thylakoids; stroma

Scientific Thinking: How Might Global Climate Change Affect Hay Fever Sufferers? Part A: The culprit in about half of all seasonal allergy cases in this country is pollen from the common ragweed plant, Ambrosia artemisiifolia. Just a single ragweed plant can produce a billion pollen grains per season! All of that pollen is spread by the wind and can remain airborne for days--sometimes landing hundreds of miles away from the parent plant. If you're an allergy sufferer, it's nearly impossible to escape contact with this allergen.As allergy sufferers and medical doctors began to report increases in both the duration and severity of seasonal allergies, researchers started wondering if there could be a relationship between allergies, rising CO2 levels, and global warming. As you know, CO2 is a necessary reactant for plant photosynthesis, and studies have shown that increasing CO2 levels increases plant productivity in some species. This is particularly true for many weedy species.Suppose that you were a researcher trying to understand how rising levels of atmospheric CO2 might affect ragweed plants, and thus seasonal ragweed allergies. What questions, hypotheses, and predictions might you want to study?

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BioFlix Activity: Cellular Respiration and Photosynthesis -- Chemical Cycling

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BioFlix Activity: Photosynthesis -- The Stages

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Connecting the Concepts: Photosynthesis Can you place the labels in this concept map that summarizes the stages of photosynthesis?

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Figure Walkthrough: A Road Map for Photosynthesis

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Figure Walkthrough: Energy Flow and Chemical Cycling in Ecosystems

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Scientific Thinking: How Might Global Climate Change Affect Hay Fever Sufferers? Part B: The researchers designed this experiment to test their hypotheses: They grew ragweed plants in growth chambers at three different levels of CO2: 1. the pre-industrial level, 280 µmol mol-1 2. the level in the year 2000, 370 µmol mol-1 3. the level projected for the middle of the 21st century, 600 µmol mol-1 They then measured the amount of pollen produced by sample plants grown under each condition and determined the concentration of protein allergens in that pollen. Here are the data they collected.

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Scientific Thinking: How Might Global Climate Change Affect Hay Fever Sufferers? Part C. Other researchers have been investigating another potential link between global climate change and ragweed allergies. They hypothesize that global warming increases the overall length of the ragweed pollen season because warmer temperatures allow for a longer reproductive season for ragweed plants. They also hypothesize that this effect will be most pronounced at higher latitudes, where projections indicate that warming will be most severe.To test this new hypothesis, researchers measured the length of the ragweed pollen season at various locations between Georgetown, Texas (latitude 30.63∘∘ N) and Sasketoon, Saskatchewan, Canada (latitude 52.07∘∘ N) in 1995 and again in 2009. They then graphed the change in the length of the ragweed pollen season (shown on the y-axis) against latitude (shown on the x-axis). What relationship between these two variables would support the researchers' hypothesis? Choose the appropriate graph line at left and drag it onto the graph's axes at right.

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