The living part of an ecosystem is called a/an A. Habitat
B. Population
C. Niche
D. Community

Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. once a virus gains entry into the body, it invades a host cell in order to? a. synthesize antibodies for defense b. deactivate the host cell's defenses c. access cell processes for reproduction d. metabolize host proteins and grow

We all have different forms of genes from our parent(s).what are these different forms called? a.alleles b.characters c.dna d.resources

Does all the energy stored by the phytoplankton reach the top level of the pyramid