Which of the following is involved in "double fertilization"?

a-sperm

b-endosperm

c-embryo sac

d-all of the above

In what way does the cardiovascular system affect the use of muscles? O A. The cardiovascular system sends messages across synapses. O B. The cardiovascular system provides calcium ions. O C.

Josephine works in a biology lab at UCLA and they have recently come up with a magic strain of bacteria that converts cellulose (the dominant organic component of grass clippings) into glucose.

During which phase does Earth see more than half of the moon's surface? 1) first quarter 2) third quarter 3) waxing gibbous 4) waning crescent

Scientists measured the population of lions and zebras in sub-Saharan Africa over a 6-year period. They wanted to measure the change in population between a predator and prey over a period of time.

Explain how reactions involving carbon-containing compounds can contribute to the greenhouse effect.

What organelle stores DNA in eurkaryotic cells?

What two genotypes would show as a dominant trait?

Lymphoma is a disease that prevents the lymph nodes from functioning properly. which would be a result someone having this disease a) they would be more likely to be harmed by common viruses b) they would be less likely to catch a cold or a flue c)

When energy is realesed during a chemical reaction what is it called?

The atmosphere contains tiny solid particles called