Which statements describe hydrotropism?

check all that apply.

1 hydrotropism is a plant’s response to light.

2 hydrotropism is a plant’s response to an external stimulus.

3 hydrotropism causes cells to grow longer on one side of the roots.

4 hydrotropism causes cells to grow longer on one side of the stems.

5 hydrotropism causes a plant to grow toward light.

6 hydrotropism causes a plant to grow away from light.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .