14. Which of the following codons code for threonine?

A. UCG

B. UGU

C. CGA

D. ACA

Clearing paths on the ground under the snow in search for grasses during the winter is part of the niche of which population in the Arctic tundra? A. indigo buntings B. Himalayan tahrs C. white-tailed deer D. Norway lemmings

Depending on the organism the jumber of __ in a cell may change

A biological community of interacting organisms and their physical environment is an

hich of the following is not a source of carbon for the carbon cycle? a. Oil b. Shells of marine organisms c. Inorganic fertilizer d. The atmosphere

A falling barometer indicates which of the following air masses is approaching? Question options: A. cold, dry air mass B. warm, wet air mass C. warm, dry air mass D. cold, wet air mass

What type of bond links monomers together to form polymers? using the analogy of a train, if cars represent amino acids, what does the entire train represent?

Differences among individuals of a species are referred to as

J. What differences can you see when you compare the nucleus of a dividing cell with that of a non-dividing cell?

What is the energy of a photon first used to do in photosynthesis?

Select the correct statement regarding chemical synapses. A) Cells with gap junctions use chemical synapses. B) The release of neurotransmitter molecules gives cells the property of being electrically coupled.