Which of the following is an example of homeostasis?

a. the lungs of animals excrete carbon dioxide

b. the beak of some birds are hooked in shape

c. we feel cooler when we stand under the shade of a tree

d. we feel warmer when all the windows are shut on a cold night

The trp operon in e. coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

What is true of sea slugs in these orders