Which statement is correct concerning the cell walls?

All plants remain rigid because of cell walls.
Plants do not need cell walls if they have water.
Some plants can remain standing without water because of stiff cell walls.

Which codon is the code for the amino acid histidine (his)?

What is the name for a substance formed in a chemical reaction

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.