Clusters of phloem and xylem tissues are called
A. root tissue
B. ground tissue
C. pith
D. vascular bundles
Ans: D. vascular bundles
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Organisms that obtain heat primarily from internal physiological sources are called ____
a. endotherms b. isotherms c. exotherms d. ectotherms e. allotherms
In the development of an oocyte, meiosis is
halted twice. What are those two phases of meiosis?
a. prophaseI and metaphase I b. prophaseII and metaphaseII c. metaphase I and prophase II d. prophase I and metaphase II e. prophase I and anaphase II
Which of the following is true of the structure
labeled "A"? a. It is composed of tubulin subunits. b. It is composed of actin subunits. c. It is a microfilament. d. It is an intermediate filament. e. It is a major component of muscle cells
A(n) ______ infection occurs when a microbe enters a specific tissue, infects it, and remains confined there.
Fill in the blank(s) with the appropriate word(s).