According to cell theory, scientists do not classify a virus as living because it does not have A) a membrane. B) genetic material. C) cellular structure. D) any organic molecules.

The dermis of mammalian skin, including that of humans, contains a large amount of extracellular matrix proteins, including collagen and elastin. As a person ages, the amount of elastin in the dermis declines.

Which heart valves are open during ventricular diastole?

Why are nitrogen-fixing bacteria so important to other organisms?

Which type of bonds are formed in the synthesis of a protein's primary structure?

What is the force of friction between a block of ice that weighs 930 n and the ground if m=.12? Acceleration

Experiment: Water Properties: Why were the results with just water so much different than the trials with the detergent?

How do fish nets effect the ocean's ecosystem?

A dog and a pig attempt to mate. we are aware that these are two different animal species. but what is the best explanation for the barrier that makes it impossible for them to successfully mate?

How do fossils and fossil record support the idea that life changes over time

1 reason why cases of violence and abuse are not reported