How many electrons does phosphorus have in its valence shell?

a. 1

b. 2

c. 3

d. 4

e. 5

What does the cell membrane do? How do materials cross it?

What is a vacuole? and what does it do?

Which of the following environmental problems could be solved by reducing the amount of packaging that people need to throw away? A. an oil spill pollutes water supplies B. a landfill is filling up too quickly C. a river is polluted with pesticide D.

Whic likelih apply Which of the following ways can a person contract a disease? Check all that apply. o through contact with other people through contact with animals through contact with objects in the environment DONE

Which type of RNA functions as the crust copy of the genetic code

A 29-year-old female presents with fever, cloudy urine, flank pain, and hematuria. these signs and symptoms support which diagnosis

What is the term for a male reproductive cell?

What happens if people keep killing sharks and who wants to stop it and how may do we kill a year

In which conditions did the water move through the cell membrane when the cell was surrounded?

What materials are filtered from the blood in the kidney