Which of the following can be a danger in an older house with peeling paint?
a. lead
b. asbestos
c. water pollution
d. excessive uv rays

What are two ways that harvesting algae from the ocean may benefit human society? how might the harvest of algae negatively impact the ocean communities where that algae grows? how could this be prevented?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells