What are the 4 primary functions of the respiratory system?

1) exTchange of gas between atmosphere and blood

2) Homeostatic regulation of body pH

3) protection from inhaled pathogens and irritating substances

4) vocalization

I think it is A, check my answer? Two hominid fossils are found in the same rock strata in caves about 10 kilometers apart in France. After radioactive dating, both are found to be about 150,000 years old.

Which best describes the cell theory? O Scientists know all there is to know about cells, so the cell theory will not change. As technological advancements are made, the cell theory may change. A theory, once formulated, cannot be changed.

Is ACHOO syndrome an inherited disorder?

Using the car analogy for regulation of gene expression in which negative control is exerted by setting the parking brake and positive control occurs by stepping on the gas pedal, which answer best defines a component of lac operon control? a.

Dual innervation refers to an organ receiving A) both sensory and motor nerves. B) both sympathetic and parasympathetic innervation. C) two nerves from the spinal cord. D) nerves from both the brain and the spinal cord.

Suppose you remove your test cultures from the incubator and notice that one of them-a known fermenter-has a gas bubble in the Durham tube. Knowing that fermenters frequently produce gas, you ignore the bubble and proceed to the next step.

In peas, yellow seed color (y) is dominant to green seed color (y). which describes an organism that has nonidentical alleles for seed color? yy and has green seeds yy and has yellow seeds yy and has yellow seeds yy and has green seeds

What would you expect to happen if sea otters were removed from this food web? Check all that apply. The population of elephant seals would decrease. The population of kelp crabs would increase. The population of kelp would increase.

When blockages in the bloodstream read the Brian it can cause blank?

A gazelle is born with slightly longer legs which allow it to run faster than the other gazelles in the herd. This adaptation came may have come about because a. the gazelle needed to be able to run faster. b.