The smallest unit that has all of the characteristics of life is the
(a). cell.
(b). tissue.
(c). organ.
(d). organ system.
(e). organism.
(a). Cell.
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If you were to penetrate through the epidermal layer
of a root, you would next encounter the a. xylem. b. endodermis. c. cortex. d. phloem. e. pericycle.
In pea plants, the allele for purple flowers (P) is dominant to the allele for white flowers (p). In a cross between a purple-flowered plant and a white-flowered plant, all 73 of the offspring plants had purple flowers
Which cross would provide such results? A) pp × pp B) Pp × Pp C) PP × PP D) PP × pp
In the process known as ____, the fate of a cell is influenced by interactions with neighboring cells
a. determination b. induction c. apoptosis d. differentiation e. tumor suppression
Which of the following correctly shows a possible order of events resulting in allopatric speciation?
A. postzygotic reproductive isolation - geographic isolation - natural selection B. geographic isolation - prezygotic reproductive isolation - genetic drift C. geographic isolation - natural selection - prezygotic reproductive isolation D. natural selection - postzygotic reproductive isolation - geographic isolation E. natural selection - prezygotic reproductive isolation - postzygotic reproductive isolation