What the purpose of the mucus found within the respiratory system is to

A. trap particles from the air before they reach the lung.

B. lubricate the epiglottis

c. is wrong

D. push the cilia away from the lungs

Which of the following is an accepted theory for the evolution of amphibians? food supply was great on land disease in the oceans internal sexual reproduction evolved none of the above

Which prediction can be made about leaf cutter ants

An example of natural selection is the red color of a male cardinal. The females of the species choose mates based on the vibrant colors of the males' feathers.

Which best describes the importance of mitosis to living organisms? genetic variation and growth growth and development development and sexual reproduction sexual reproduction and genetic variationWhich best describes the importance of mitosis to

If there were five guanine bases in one strand of your model of DNA, how many cytosine bases would there be in the complementary strand?

In what part of cell does replication occur

What factors influence the impact a population has on its environment?

What kind of bonds form between the oxygen atoms of one water molecule and the hydrogen atoms of another water molecule

Salamanders brought into a new ecosystem that is colder than its all ecosystem the salamander cannot survive in the cold temperature in days which is the best way to describe a salamander in the new ecosystem

Trace a drop of blood from the left atrium to the left hallucinating and back to the right atrium