The plasma membrane of some white blood cells contain ________ that bind with proteins of cells such as bacteria that have invaded the human body. These special proteins tell the white blood cells those bacterial cells do not belong to that particular human and to phagocytize (eat) them.
a. channel proteins
b. receptor proteins
c. diffusion proteins
d. carrier proteins
Ans: b. receptor proteins
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The specific process by which a caterpillar becomes a butterfly is called
A. epigenesis. B. cellular differentiation. C. gastrulation. D. involution. E. metamorphosis.
Which of the following does NOT describe bacterial flagella?
a. smaller and simpler than eukaryotic flagella b. consist of a helical fiber of protein c. found in all motile bacteria d. powered by a gradient of hydrogen ions e. lacks microtubules.
Microvilli are indicated by
a. A. b. B. c. C. d. D. e. E.
TRAIT SPECIESABCDE100100210101310101411100511110611110 The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which trait is least informative of phylogenetic relationships within the group?
A. A B. B C. C D. D E. E