Which defense mechanism(s) is/are found in invertebrates?
a. phagocytes and antibodies
b. lysozyme and antibodies
c. antibodies only
d. phagocytes and lysozyme
e. phagocytes, lysozyme, and antibodies
ANSWER: d
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Some microorganisms can undergo ________ in which various cell types can become specialized and arise from one parent cell type
A) differentiation B) genetic exchange C) maturation D) mutagensis
A scientist is studying a population of feral cats in his city. After ten years, he notes that—for the population of feral cats he is studying—(K–N)/K = 0
Based on this information, what can he deduce about the logistic growth curve for the population at this point in time (recall Figure 46.5)? A. The curve resembles an exponential growth curve. B. The curve is at its inflection point (i.e., the rate of growth has started to slow). C. The curve has plateaued at K. D. The curve is at its steepest point.
Populations are best defined as
A. all members of a species. B. all organisms found in an environment. C. metacommunities. D. families. E. groups of interbreeding populations.
Where does pyruvate oxidation occur in eukaryotic cells?
A. in the Golgi body B. in the mitochondria C. in the plasma membrane D. in the nucleus E. in the cytoplasm