Natural selection, as a mechanism of evolution that acts on variants within populations and ultimately leads to the evolution of different species, was proposed by
A. Malthus.
B. Mendel.
C. Founder.
D. Lyell.
E. Darwin.
Answer: E
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The defining characteristic of a stem cell is
A) self-repair. B) self-renewal. C) the ability to turn into a cancer cell. D) its origin from a progenitor cell.
The hydrocarbons found in the membranes of archaea are identical to those found in bacteria.
Answer the following statement true (T) or false (F)
Which statement is not true about conifers?
a. Conifers are gymnosperms. b. All conifers belong to the genus Pinus. c. All conifers have naked seeds. d. Conifers are heterosporous.
Which of the following describes an organism that obtains energy from light?
A) autotroph only B) phototroph only C) autotroph and phototroph D) heterotroph and chemotroph E) autotroph, phototroph, and chemotroph