There are three principal types of bonds that hold multiple atoms together. These are:
a. covalent bonds, ionic bonds, and disulfide bonds.
b. hydrogen bonds, ionic bonds, and glycosidic linkages.
c. ionic bonds, hydrogen bonds, and ester bonds.
d. phosphate bonds, disulfide bonds, and hydrogen bonds.
e. covalent bonds, ionic bonds, and hydrogen bonds.
Ans: e. covalent bonds, ionic bonds, and hydrogen bonds.
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You are studying a population of geese in which there are two color phases, brown and gray. Color in this species is controlled by a single gene, with brown dominant to gray. A random sample of 250 geese shows that 210 are brown. What percentage of the brown geese are heterozygous? (Assume that the population is in Hardy-Weinberg equilibrium.)
A. 48% B. 57% C. 36% D. 43% E. 84%
Saber teeth found in different groups of extinct carnivorous mammals are considered ________ structures, as the fossil record shows that saber teeth evolved independently among the groups.
Fill in the blank(s) with the appropriate word(s).
Enhanced immune responses to subsequent exposures to an antigen to which the body has already been exposed are known as ________ responses
A) third-degree immune B) allergic C) primary immune D) memory E) autoimmune
The brain uses three variables to determine the location and intensity of a stimulus. What are they?
What will be an ideal response?