You've been growing numerous plants in a greenhouse in dishes called flats. different flats have different number of plant species in them (ranging from 1, 2, 4, and 8). you've grown these plants for 6 weeks and finally examining them.
suppose you changed this lab's experimental design. which of the following changes would probably not change the results?
a. substituting slow-growing lettuces for rutabaga and mustard.
b. letting the plants grow for twice as long, so some of the "fast-starters" slow down growth and "slow-starters" speed up.
c. restricting water and/or nutrients, instead of supplying ample quantities of both.
d. adding leaf-eating caterpillars that prefer rutabaga.
e. moving the trays farther apart in the greenhouse, so the edges don't touch one another.
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Ответ:
Ответ:
bacteria
Explanation:
Nitrogen gas (N2) diffuses into the soil from the atmosphere, and species of bacteria convert this nitrogen to ammonium ions (NH4+), which can be used by plants. Legumes (such as clover and lupins) are often grown by farmers because they have nodules on their roots that contain nitrogen-fixing bacteria.