Phytoplankton play an important role in which of the following biogeochemical cycles?

a.) the nitrogen cycle
b.) the phosphorus cycle
c.) the carbobon cycle

Idont understand by supporting the plant and holding the leaves up to the light. question 3 options: tap or fibrous root flower petals herbaceous or wood stems leaves with stomata

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Choose one animal (cheetas) and research on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.