Explain what you think the phrase 'survival of the fittest' means.

Some viruses attack cells by inserting their own dna into the host cells dna why might it be simpler for these viruses to attack prokaryotic cells

Blood carries oxygen from the lungs and distributes it to all the cells in the body. Which blood cells are responsible for this function?

The nurse is caring for a patient who has sustained severe burns to 50% of the body. the nurse is aware that fluid shifts during the first week of the acute phase of a burn injury cause massive cell destruction.

What are on the surface of most vertebrate cells, acting as markers of self?

What is advantage is conferred to algae and plants that possess sporopollenin?

Why can't humans digest all carbohydrates?

Why do water and solutes leave capillaries at the arterial end? A) the net filtration pressure of the blood is higher at the arterial end than it is at the venous end.

Which of the following best describes scientific theory? A.) it cannot be changed B.) it explains very few observations C.) it is basically speculation D.) it may change

What structure is responsible for the opening and closing of the stomata

Which of these changes is a chemical change?