Agriscience, Unit 3: Question Preview (ID: 29919)


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Animal cells do NOT contain which of the following?
a) RNA b) DNA c) membranes d) chloroplast
The danger of crops becoming extinct before scientists can study them is:
a) future scientists will not have jobs. b) only scientists fully understand how useful plants can be. c) opportunities for improved crops or new medicines will be lost. d) scientists have not yet developed effective classification standards for plants.
Plants with fibrous roots are better for the environment than those with taproots for all the following reasons EXCEPT
a) fibrous roots help prevent soil erosion. b) fibrous roots need more water than taproots. c) fibrous roots are more likely to put nutrients back in the soil than taproots. d) fibrous roots are very effective in getting nutrients from the soil to the plant.
In plants, the process of osmosis is important for:
a) reproduction. b) absorbing oxygen and releasing nitrogen. c) transferring energy into glucose. d) acquiring water and water-born nutrients.
Bearing fruit benefits plants because:
a) it prevents them from getting too tall. b) it encourages cross-pollination. c) it produces and spreads seeds. d) it attracts parasites.
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) Respiration occurs only after the sun has set for the day. d) Keeping still during the day is plants’ natural defense against animals.
Systems thinking is especially important in agriculture and agriscience because
a) agriculture is like a family. b) it is important in science in general. c) natural resources are interrelated. d) those in agriculture create the systems they work with.
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) Levels of minor nutrients can get too high. d) The plant can have difficulty absorbing nutrients.
The cell division process that allows two different organisms to contribute DNA to an offspring is known as
a) Osmosis. b) Mitosis. c) Meiosis. d) RNA.
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 percentage of rock dramatically increases after the O Horizon. c) The D Horizon prevents nutrients from reaching the other levels. d) Farmers do not take care of soil below the O Horizon.
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