Essay on the Principle of Population, written by Thomas Malthus in 1798, influenced Darwin's thoughts as he struggled to understand what mechanisms could be at work to produce evolution. Malthus proposed that populations of animals and plants, including humans,
A. increased arithmetically in numbers while the nutrients available only increased geometrically.
B. evolved from islands to mainland, thus explaining why unrelated species on the mainland are found in the same location.
C. increased geometrically in numbers while the nutrients available only increased arithmetically.
D. decreased arithmetically in numbers while the nutrients available increased geometrically.
E. evolved from mainland to islands, thus explaining why the island flora and fauna resembled the mainland species so closely.
Answer: C
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A. more B. less C. the same
During this phase of the cell cycle chromosomes start to condense:
A. Metaphase B. Prometaphase C. Telophase D. Anaphase E. Prophase
Caenorhabditis elegans is an organism with exactly 959 somatic cells. This organism is a(n)
A. fruit fly. B. angiosperm. C. fungus. D. nematode. E. earthworm.
Which of the following statements would Darwin have disagreed with?
A) Species change over time. B) Living species have arisen from earlier life-forms. C) Descent with modification occurs through inheritance of acquired characteristics. D) Descent with modification occurs by natural selection.