Science
Plants absorb nitrogen from:
the soil
The water table is:
the surface of ground water
What substance is transpired through the stomata of the leaves in a plant?
water
What natural laws did Mendel investigate?
genetics
The Industrial Revolution:
helped farmers grow more crops introduced machines to agriculture decreased the amount of manual labor in farming
Which of the following is not a reason for creating hybrid plants?
increase resistance to fertilizer
Increased irrigation demands:
increase the rate of surface water evaporation
Which of the following does not have a global cycle?
iron
Rhizobium bacteria obtain moisture from:
legumes
When a plant is entering the Calvin cycle of photosynthesis_____.
light energy is not required to proceed
Select all that apply. Food production has increased greatly due to the development of:
machines chemicals hybrid plants
Energy for the cell's use is stored when
ADP and P form ATP
The name given to the metabolic pathways in which cells harvest energy from food molecules is
Cellular respiration
During the Calvin cycle:
Glucose and water are produced.
What does the plant do with the extra glucose produced from photosynthesis? Select all that apply.
It is stored in the plant as starch. It is stored in the plant as fructose.
The waste product of photosynthesis is:
Oxygen
During light reactions:
Oxygen is released by stomata. Water is split into hydrogen and oxygen. Light energy is converted into chemical energy.
Mendel's experiments showed that:
Plant characteristics are inherited.
Mendel discovered that:
Plant traits are inherited.
If the water table is not too deep, how do plants tap into it?
Plant's roots can take up water by capillary action.
During glycolysis glucose is broken down into two___ molecules.
Pyruvic acid
Crop rotation is important because:
Some plants use a lot of nitrogen. It increases soil fertility. Repeated planting of the same crops decreases soil quality.
Select all that apply Which statements apply to glycolysis?
Splits a glucose molecule into pyruvic acid Occurs without oxygen present Occurs in all living things
Yeast is a:
fungi
Poor soil quality can be improved by:
planting legumes
In an ecosystem, phosphate levels are usually low because:
the weathering of rock is a slow process
Which of the following statements is true?
Many countries do not have access to modern agricultural processes.
The Krebs cycle is considered a cycle because?
The oxaloacetic acid formed remains in the mitochondria for the next acetyl CoA
Due to food scarcity in ancient times, people had to spend _____.
a great deal more time than today to cultivate and find food
Rhizobium:
are nitrogen-fixing bacteria live in the nodules of legumes convert nitrogen in soil into nitrogen compounds
Condensation occurs when:
atmospheric water changes into precipitation
Herbicides:
can increase crop yields by killing weeds
Plants depend on the atmosphere for the largest source of:
carbon
Burning fossil fuels and wood increases the amount of _____ in the atmosphere.
carbon dioxide
Burning oil and coal adds_____ to the atmosphere.
carbon dioxide
During photosynthesis, plants use____obtained from animals.
carbon dioxide
The waste product of respiration is:
carbon dioxide
Which of the following summarizes photosynthesis?
carbon dioxide + water → glucose + oxygen + water
In animals, extra protein is:
excreted as waste material
After strenuous exercise sore muscles can occur because of?
A buildup of lactic acid in the tissues
Yeast has many commercial uses in the production of
Breads Fuels Wine
The exchange of gases between animals and the environment is called
Breathing
Which of the following statements is true?
The world's production of food is unequally distributed.
Guard cells:
control the size of stomata
What distinguishes a fungi from a plant?
does not contain the photosynthetic pigment chlorophyll
Capillary action:
draws water from the soil to the surface helps the roots of plants obtain water is the upward movement of water between particles of soil
Which two of the following methods were first introduced to slow decay?
drying salting
What improvements have been made in modern farming? Select all that apply.
machines can do more work over less time trains can transport food over long distances faster trains can transport the machines to rural farms once built insecticides used to keep insects off the crops
The process of converting nitrogen into nitrogen compounds by bacteria is called:
nitrification
Select all that apply. Which of the following elements are obtained by plants from the soil?
nitrogen phosphorus potassium
How do bacteria get their food? Select all that apply.
obtain it from decaying organic matter obtain it parasitically from living organisms
The amount of carbon dioxide released into the atmosphere is balanced by the release of:
oxygen
Select all that apply. Which substances pass through a leaf's stomata?
oxygen water carbon dioxide
A large amount of algae in a lake is a result of:
phosphate and nitrogen pollution
Select all that apply. Which of the following elements are obtained by plants from the soil?
phosphorus potassium nitrogen
What kind of foods did ancient people eat?
plants, animals, and fish
The Calvin cycle:
produces glucose and water is the second stage of photosynthesis does not require light
A catalyst:
promotes a chemical reaction
The decay cycle:
reduces the amount of dead material
Destruction of tropical rain forests:
reduces the amount of water vapor
Carbon dioxide is returned to the atmosphere through:
respiration
Select all that apply. Animals return water to the atmosphere through:
respiration perspiration elimination
Most of the phosphorous on earth comes from:
rocks
The main source of phosphorous is in:
rocks
What happens to the precipitation that reaches land? Select all that apply.
runs off into the oceans runs off into streams and rivers enters the water table of groundwater taken up from shallow soil by plants
The amount of nitrogen in the atmosphere is affected by:
sewage treatment plants inorganic nitrogen fertilizers pollution from factories
Nitrogen-fixing bacteria get nitrogen from:
soil
Plants obtain nitrogen from the:
soil
Plants obtain phosphorous from:
soil
Carbon dioxide enters a plant through the:
stomata
Select all that apply. Which statements apply to "food"?
storage medium for energy release energy during decomposition
Extra sugar from photosynthesis is:
stored as starch
Ground water is:
stored in porous soil and rock
What are some of the benefits of a hybrid strain crop? Select all that apply.
stronger more disease resistant better yields
Fertilizers:
supply plants with nutrients and minerals
Which of the following is the correct meaning of transpiration?
the evaporation of water through the stomata
Plants return water to the atmosphere through:
transpiration
The loss of water vapor through stomata is known as _____.
transpiration
What method(s) do plants use to obtain nitrogen? Select all that apply.
use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil
The most common compound on earth is:
water
A catalyst is a chemical:
which promotes a chemical reaction
Which of the following is a reason for creating hybrid plants?
yield more crops