If a person has type b blood, which statement describes the antibodies present in his or her blood? a. only anti-a antibodies are present. b. only anti-b antibodies are present. c. both anti-a and anti-b antibodies are present. d. neither anti-a nor anti-b antibodies are present.

Which best describes a rhinovirus? o a. a virus that causes a common cold o b. a protective shell around a virus o c. a tube the comes off a virus o d. a piece of dna transferred by a virus

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.