What mechanisms do plants use to load sucrose produced by photosynthesis into specialized cells in the veins of leaves?

A) an electrogenic pump

B) a proton pump

C) a contransport protein

D) A and C only

E) A, B, and C

How do genes get expressed in an organism?

Huma Whic intera (1) 2. Which statement accurately compares cells in the human circulatory system to cells in the human nervous system?

What are two types of evidence that evolution has taken place?

What is thethe protein-assembly factories of the cell, are present in prokaryotic cells, animal cells, and plant cells.

Jorge is conducting an comparative experiment where he is comparing the heights of adults who grew up taking a certain vitamin and adults who did not. He finds that those who took vitamins are, on average, 2 cm taller.

If many trees are removed from a forest by logging, what is themost immediate effect on the carbon cycle in that forest? A. increased rates of decomposition B. decreased rate of atmospheric CO2 C. decreased combustion of fossil fuels D.

How many of Earth's plant species are used as agricultural crops? A) 1,000 B) 3,000 C) 5,000 D) 7,000 E) 9,000

Dendrites are branching cytoplasmic projections of neurons that receive impulses and transmit them to the cell body. a. True b. False

What is the difference between a reactant and a product?

How did the theory of special creation differ from darwin's theory of evolution by natural selection?