Species richness describes the abundance of species in a community. the number of different species in a community. the number of species in a population. the landscape of a region. all the biotic and abiotic factors in an ecosystem.

What links the two strands in a dna helix together in the middle? a. phosphate groups b. sugar rings bonded together c. proteins d. bases with hydrogen bonds

After getting the slide and microscope ready, stella is eager to see the microscopic pond water specimen! she crouches around her microscope and aligns her eye with the microscope’s eyepiece. but she's only able to see a bright white light. at this point, no specimens or cells are visible on stella's pond water slide. after taking a moment to collect her thoughts, stella realizes she can't see any lifeforms because .

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism