Explain the causes and consequences of sickle-cell anemia.

Which of these organisms is a producer in a marine ecosystem?

Pku (phenylketonuria) is an autosomal recessive disease, in which the synthesis of amino acid tyrosine from phenylalanine is blocked. as a result, an excess of phenylalanine gets converted into phenylketones, which appear in the urine.

Food production has significantly increased over the last century to keep up with the demands of the growing world population. According to the graph shown above, fertilizer use has also increased to improve plant growth during crop production.

Describe the three types of predation and give an example of each.

For plants, what are the advantages and disadvantages of growing tall?

The possibility of down syndrome and other chromosomal disorders increases as the mother's age increases because

What happens during the light reaction of photosynthesis? A. Water molecules combine to make food. B. Air and water create energy for a plant. C. Carbon dioxide is combined with glucose. D. Water molecules split apart.

The purpose of a mordant in the Gram stain is to:a. remove the simple stain. b. make gram-negative cells visible. c. prevent the crystal violet from leaving the cells. d. make the bacterial cells larger. e. make the flagella visible.

Water molecules are heated until they become water vapor A) potential energy increases and kinetic energy decreases B) kinetic energy increases and potential energy decreases

Choose three types of fossils. Describe their appearance AND how they were formed.