Agrapevine growing around a fence post is an example of?
a- phototropism
b-photoperiodism
c- geotropism
d- thigmotropism

Tropism is plant growth in a response to a stimulus.

Through the process of elimination:

A - phototropism is plant growth in a response to light. 

B - Photoperiodism is an organism reaction to the lengths of days and nights.

C - Gravitropism is plant growth in a response to gravity.

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.

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

i hope this you