What did Thomas Hunt Morgan discover?

Does a single cells organism lack structure that maintain a dynamic equilibrium, while multi cellular has those structures?

Explain how a hormone may cause its effect on plant growth and development.

reproduction allows for species to evolve or adapt to a greater range of conditions.

Less than 0.1% of the energy in a food chain generally makes it from the sun to quaternary consumers. True or False

Is there any reason that meiosis could not occur in an organism whose genome is always haploid?

Based on Milgram's obedience study, it would be expected that a military soldier would be least likely to follow orders to shoot an enemy combatant in what circumstances? (A) When the order to shoot comes from a very low-ranking officer.

A cricket has a diploid genome of 1.2 billion base pairs. Assume that there are about 200,000 individuals in the population and that the mutation rate is one per 100 million base pairs.

When two or more atoms are chemically bound together, they are called

What converts nitrogen into a usable substance during the nitrogen cycle? A. Consumers B. Decomposers C. leaches D. Nitrogen fixing bacteria

What organism performs all life processes in one cell