Exam 1 BIO

Living organisms maintain a constant internal environment by sensing and responding to their internal conditions. This stable maintenance of internal conditions is 1. homeostasis 2. evolution 3. reproduction 4. sensation

1. homeostasis

A scientific hypothesis must be constructed with which of the following characteristics? 1. it is always provable and clearly states what is already known to be fact 2. it provides reasonable explanation to a question and is consistent with current observations it must be testable and falsifiable 3. it provides an explanation consistent with accepted theological ideas and does not need to be tested 4. it does not require testing by experiment or observations, it is not falsifiable

2. it provides reasonable explanation to a question and is consistent with current observations it must be testable and falsifiable

A species of butterflies gradually become darker in color over generations this is an example of which characteristics of living organisms? 1. they reproduce using DNA 2. they obtain energy from the environment to support metabolism 3. they evolve as groups 4. they sense the environment and respond to it

3. they evolve as groups

whenever we __________we are proceeding scientifically 1. invoke a supernatural power as an explanation for how a natural phenomena occurred 2. stop questioning our observations 3. try to solve a problem by systematically evaluating the plausibility of various solutions 4. develop an unchangeable and definite explanation

3. try to solve a problem by systematically evaluating the plausibility of various solutions

is it important for scientists to communicate their results to fellow scientists? 1.yes, scientists want to receive recognition and monetary reward for their work 2. no, there is no reason for scientists to communicate their results 3. yes the quality and accuracy of the scientific work can be enhanced by input , review and possibly even repetition by other scientists. 4. no communication between scientists is discourages

3. yes the quality and accuracy of the scientific work can be enhanced by input , review and possibly even repetition by other scientists.

which is the most basic 1. 5 2. 7 3. 8 4. 10

4. 10

The subatomic particles that possess a single negative charge and surround the nucleus are the 1. isotopes 2. protons 3. neutrons 4. electrons

4. electrons

living cells have an intact phospholipid bilayer that seperates the cell from its external enviroment this structure is referred to as 1. nucleus 2. mitochondria 3. endoplasmic reticulum 4. plasma membrane

4. plasma membrane

if a plant has 18 chromosomes how many will be present in its gametes

9

stages of inter phase

S, G1, G2

what are the similiarities between mitosis, meiosis, and binary fission

all 3 are used to produce daughter cells

photosynthesis and cellular respiration are both complementary of each other early history on life showed increased oxygen concentration. this indicates that

amount of photosynthesis occurring exceeded the amount of cellular respiration

Viruses

are a small piece of genetic material encased in proteins, non-cellular infectious agents that are only capable of reproducing when inside a living cell

nucleotides

are the building blocks of nucleic acids

the central element found in organic molecules is 1. calcium 2. carbon 3. silicon 4. sodium

carbon

chemical reactions that break down lipids are

catabolic

Recently, beekeepers have noticed an alarming and sudden disappearing of honeybees from their hives. Some beekeepers and environmentalists worry that crops genetically engineered to contain the gene for the Bt insecticidal toxin may be killing the bees. Which of these experiments tests the hypothesis that Bt is killing the bees?

collecting hundreds of bees. half of the bees will be kept in a facility with plants genetically engineered to contain Bt toxin while the other half will be kept in a facility with plants not genetically engineers for Bt and both sets will be calculated and compared.

homologous chromosomes

consist of maternal and paternal copy of each chromosome

summarize the events in the calvin cycle

cycle uses ATP and NADPH to produce sugars

You are given an unknown substance and asked to determine if it is polar or nonpolar. The easiest way to do so is

determine whether the compound dissolves in water

an acid is a polar substance that dissolves in water and

donates hydrogen ions to the solution

first law of thermodynamics is

energy cannot be created or destroyed

three stages of cellular respiration are

glycosis, krebs cycle, and oxidative phosphorylation

a given enzyme

increases the rate of a particular reaction

Which of the following distinguishes ionic bonds from covalent bonds?

ionic bonds hold together oppositely charged atoms, whereas covalent bonds hold together atoms that share electrons

the smooth endoplasmic reticulum

is the site where lipids destines for cellular compartments are manufactured

capture and use of energy by living organisms involve numerous chemical reactions, these are known as

metabolism

chromosomes line up at the middle of the cell during

metaphase

your muscle cells need large amounts of ATP to function in the movement of your body. which organelles would you expect to be especially abundant in muscle cells?

mitochondria

during the process of ________ the water diffuses across a semipermiable membrane from one area where water is more concentrated to an area where water is less concentrated

osmosis

goal of mieosis

produce eggs and sperm

ribosome are very small non membranous organelles, that can either exist freely in the cytoplasm or be embedded in the endoplasmic reticulum of a cell. they are associated with the synthesis of

proteins

carbon dioxide is one product of a metabolic process which occurs in plants and animals. this process is

respiration

If a bottle of perfume is sprayed in a corner of a room, the students closest would smell it first and the students farthest would eventually smell it. This is

simple diffusion

what is the role of water in photosynthesis

water provides electrons to the chlorophyll

what is the importance of photosynthesis to other organisms besides plants

we eat plants and absorb the energy they make through photosynthesis

best analogy of the function of the golgi apparatus

worker in a factory who places labels on products and packs them into a shipping box