Which specialized cells act as a barrier to protect tissues within the body?

epithelial cells

neurons

red blood cells

smooth muscle cells

Name 4 unifying theme of biology

Explain why the force of gravity will allow you to extend your forearm even if the triceps brachii is not functioning

Explain how thing that plants or animals do are done by the work of cells?

At which trophic level are dragonflies that consume

What are the diffrence between symbiosis and symbiotes

Which cell organelle synthesizes phospholipids and steroids

Margot is pregnant with her first child, and she is deliriously happy! She and her husband have some tests taken, but before the doctor can come in and review the results, Jim sneaks a peek at the file with the test results.

How do cancer grows and spreads

Which statement best illustrates the concept of the interrelationship of living things with the physical environment, as found in the definition of ecology? A) Hawks and eagles often compete with each other. B) White-tailed deer shed their antlers.

Which statement is true about a liquid but not a gas? Question 7 options: A. It has more internal energy than the solid state. B. It has close to a constant volume as pressure is applied to it. C.