A polar bear maintains a mostly constant body temperature.

What does this represent?

blood control

genetic variation

ecological niche

homeostasis

What did Renaisance writers write about?

When scientists examine the fossil record, they find the remains of different species in layers of rock of different ages. What do they deduce from this? A. the earth experienced many floods in the distant past B. fossils sink at different rates C.

The current system of classifying organisms using molecular analysis and is called

A plant is notice to have curled leaves and stunted growth which nutrient is it most likely missing? A. Calcium B. Magnesium C. Potassium D. Phosphorous

Why do scientists arrange the organisms on the tree below with some organisms closer than others? A) The organisms that are closest to one another are the same organisms B) The organisms that are closest to one another evolved from each other C) The

What three factors does a species diversity index take into account? a. Species richness, species diversity, and species productivity b. Species richness, species abundance, and species evenness c.

Wins or losses are the ultimate measure is competitive sports. True or false?

DNA, the genetic material of living organisms, is damaged by light in the A) visible region of the spectrum. B) ultraviolet region, especially below a wavelength of 320 nm. C) ultraviolet region, especially above a wavelength of 340 nm.

Genetic engineering to create biomedical products that benefit society often involves of recombinant DNA technology. Recombinant DNA is DNA that has?

What is biology and name all the branches of biology that you know?