Can blood group A donates blood to blood group O? why?

According to the endosymbiotic hypothesis, why did the large cells not destroy the small aerobic cells they engulfed? A. because they were so tough B. because they provided energy C. because they were parasites not food D.

Underlying blood vessels give nails a pinkish appearance. Near the nail root, however, the blood vessels lie deeper in the skin, resulting in a pale crescent, called the:

Which body systems primary function is the continuation of the species

Science question 1 What are the criteria for a good scientific question? Question 2 How do you formulate a good hypothesis?

Where can a dna be found in a prokaryotic cell

What best describes a theory

How do limiting factors impact different organisms?

Reabsorption of filtered glucose from the filtrate into the cells of the proximal tubule is by: Reabsorption of filtered glucose from the filtrate into the cells of the proximal tubule is by: a) secondary active transport. b) diffusion. c) antiport.

Why isn't the Gram stain used on Acid fast bacteria? If you did Gram stain acid-fast bacteria, what would their Gram reaction be? What is the Gram reaction of non-acid-fast bacteria?

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? A) sporopollenin B) lignin present in cell walls C) pollen D) use of air currents as a dispersal agent E) megaphylls