Where on the phylogenetic tree should the origin of chloroplasts appear?

What is the purpose of ethical guidelines for handling of experimental subjects

What ion is entering the axon terminal at A, and what effect does it have?

Aphids eat plant sap, and they excrete honeydew that ants can use as one source of food. Ants have been observed protecting aphids from predation by ladybugs.

Which of the following does NOT have a part in controlling the balance of an ecosystem? Consumers Decomposers Sun Producers

What is abdominal cavity?

In beetles, the gene for color and the gene for pattern are located on the same chromosome and exhibit recombination.

Nucleic acids are composed of monomers called?

Cyclic amp (camp) stimulates one's metabolic rate. many supplement companies offer products claiming to increase the levels of this chemical within the body.

Injecting a person with a killed-bacteria vaccine can protect that individual from a disease because the proteins of the bacteria: A) remain in the body and live bacteria later prey on them instead of live tissue B) blind with receptors in the body,

Consider two cells, A and B. Both are approximately spherical, but cell A is a bacterium with a diameter of only about 1 µm, while the diameter of the eukaryotic cell B is about 10 µm.