Which statement best describes connective tissue:?

a. usually lines a body cavity

b. usually contains a large amount of matrix

c. primarily concerned with secretion

d. always arranged in a single layer of cells

Which statement describes a reason why stem cell research is important? A. It allows scientists to mix the genes of different organisms to produce desired traits. B. It allows scientists to put healthy genes in cancer cells. C.

The law of superposition states that layers of sedimentary rock are A. ordered in a random fashion, with the age of the rock varying wildly from one layer to the next. B.

What are the two basic kinds of cells?

Some parasitic leeches are attracted by warmth what type of host would you expect such leeches to have, what would be the adaptive advantage of this attraction

Why do you think bacteria were chosen for use in human gene cloning? a bacteria have similar genes to humans. b bacteria are already present in the human body. c bacteria multiply quickly via asexual reproduction. d bacteria are immune to diabetes.

Can a molecule may contain two atoms of the same element

What are the warning signs of COPD?

Which describes the genetic code in a human? A. Different genetic codes appear in each different type of cell. B. Every human has the same exact genetic code. C. Genetic codes change frequently in reaction to external factors. D.

Over time, natural selection results in species that are what?

With of the following is not an energy source a) monosaccharides B) polysaccharides C) vitamins D) lipids