What do enzymes react with?

A. the products of chemical reactions

B. the active site of the plasma membrane

C. proteins in the cytoplasm

D. a specific substrate

Why must the sperm and egg undergo meiosis? so that the offspring will have 1/2 the chromosomes so that the offspring will have the correct number of chromosomes so that the offspring will have double the number of chromosomes

Bacteria live in a variety of locations one of which is the human mouth. Which explanation supports the wide variety of bacteria in the mouth? A. Accessibility to air cause bacteria to change form. B.

A young girl is staring at the raindrops running down her window. She notices that the raindrops remain more or less intact, even as they cascade down the windowpane. This is a result of: A. covalent bonds between water molecules. B.

Explain why hormones spread throughout the body only act on certain tissues and not others.

Glaucoma is a leading cause of blindness. Studies have linked a common form of glaucoma to three genes and more than 20 genetic loci. Which best describes glaucoma?

A conclusion can eliminate the hypothesis as the answer to the proposed question. True or false.

Cichlids are bony fish that are commonly found in the freshwater lakes of Africa, like Lake Victoria. There are more than 2000 recognized species of cichlids in these freshwater lakes.

Which statment best describes the relationship between RNA and DNA

Which statement most correctly describes surrogacy

What type of symmetry is associated with diploblastic organisms? Which phylum is the exception to this rule and why?