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Agriscience, Unit 3
Test Description: Unit 3 quiz
Instructions: Answer all questions to get your test result.
1) Animal cells do NOT contain which of the following?
A
DNA
B
RNA
C
membranes
D
chloroplast
2) The danger of crops becoming extinct before scientists can study them is:
A
future scientists will not have jobs.
B
opportunities for improved crops or new medicines will be lost.
C
only scientists fully understand how useful plants can be.
D
scientists have not yet developed effective classification standards for plants.
3) Plants with fibrous roots are better for the environment than those with taproots for all the following reasons EXCEPT
A
fibrous roots need more water than taproots.
B
fibrous roots are more likely to put nutrients back in the soil than taproots.
C
fibrous roots help prevent soil erosion.
D
fibrous roots are very effective in getting nutrients from the soil to the plant.
4) In plants, the process of osmosis is important for:
A
transferring energy into glucose.
B
absorbing oxygen and releasing nitrogen.
C
acquiring water and water-born nutrients.
D
reproduction.
5) Bearing fruit benefits plants because:
A
it encourages cross-pollination.
B
it prevents them from getting too tall.
C
it attracts parasites.
D
it produces and spreads seeds.
6) Why is respiration visible in plants only at night?
A
It causes a small glow that is not detectable in daylight.
B
It is masked by photosynthesis during the day.
C
Keeping still during the day is plants’ natural defense against animals.
D
Respiration occurs only after the sun has set for the day.
7) Systems thinking is especially important in agriculture and agriscience because
A
it is important in science in general.
B
those in agriculture create the systems they work with.
C
natural resources are interrelated.
D
agriculture is like a family.
8) What can happen if the soil is too acidic?
A
The roots will be eaten away by the acid.
B
The plant will develop a bitter taste.
C
The plant can have difficulty absorbing nutrients.
D
Levels of minor nutrients can get too high.
9) The cell division process that allows two different organisms to contribute DNA to an offspring is known as
A
Mitosis.
B
RNA.
C
Meiosis.
D
Osmosis.
10) Why does soil become less fertile the deeper into the Earth it gets?
A
The farther down, the more it is removed from organic matter.
B
The D Horizon prevents nutrients from reaching the other levels.
C
Farmers do not take care of soil below the O Horizon.
D
The percentage of rock dramatically increases after the O Horizon.
*select an answer for all questions
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