You are examining a rigid plant tissue; it does not flex or bend. Tests show that it is not consuming oxygen gas, as would be expected if aerobic respiration were occurring. This tissue is probably
A) collenchyma.
B) phloem.
C) epidermis.
D) sclerenchyma.
E) parenchyma.
D
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Which population has a small percentage of Denisovan genes, thus suggesting interbreeding?
a. Asians b. Melanesians c. H. floresiensis d. Neanderthals e. chimpanzees
Dispersion is
A. the ability of an individual to move. B. the rate of movement of a population. C. the spatial distribution of abiotic factors. D. the spatial distribution of individuals. E. the timing of reproduction.
The smallest unit of life that can exist as a separate entity is a(n) ___________.
A. cell B. molecule C. organ D. population E. ecosystem
A cell that is able to give rise to every cell in the adult body is called a _______ cell.
A: morphogenic B: pluripotent C: determined D: multipotent E: totipotent