The extracellular ground substance of the matrix is composed of ____
a. cartilage
b. polysaccharides
c. lipids
d. proteins
e. elastin
ANSWER: b
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If survival rates do not vary with age, as in many species of perennial plants, reptiles, adult birds, and rodents, survivorship curves are typically
A) type I. B) type II. C) type III. D) type IV.
Each of the following is true about plant pectins except
A) pectins are long unbranched polymers. B) pectins form the matrix in which cellulose microfibrils are embedded. C) pectins bind adjacent cell walls together. D) pectins trap and bind water molecules. E) pectins have a gel-like consistency.
In this sample of cells, what stage of the cell cycle are most of the cells in?
A) G1 B) S C) G2 D) mitosis
The menigococcus attach to the mucus membrane via
A. flagella. B. pili. C. cilia. D. a capsule.