A scientist, who wants to study the effects of nitrogen on wheat plants, sets up an experiment with 4 groups of wheat plants: group A gets 20 pounds per acre, group B gets 40 pounds per acre group C gets 60 pounds per acre, and group D gets 0 pounds per acre. Which of the following control group?
D) group D T/F

Answers:

True

Group D✔✔✔

Explanation:

Group A❌

Group B❌

Group C❌

Group D✔✔✔

A control group (in all sciences, not only biology) is a particular group of experimental subjects that are not introduced to the experimental change. For example: in an experiment to test for the effect of sunlight on plant growth, the test subjects are introduced to varying range of exposure to the sun while the control group is kept in the dark.

In this case study, group D gets 0 pounds per acre, so the control group is the group not given nitrogen.

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.