How did Thomas Malthus's ideas, about human population, affect Darwin's ideas on natural selection?
A. Darwin decided that if human population increased with each successive generation, all animals and plants must reproduce using the same principles.
B. Darwin abandoned his idea of natural selection because Malthus' work proved that populations would continually double in number with each generation.
C. Thomas Malthus believed that human populations declined when temperature drops, therefore Darwin concluded that all plant species will not reproduce in cold temperatures.
D. Mallthus believed that only a fraction of any population will survive and reproduce, Darwin contradicted Malthus's theories and said that all species will continue to survive and reproduce indefinitely.
E. Malthus theorized that only a fraction of any human population will survive and reproduce. Darwin's observations during his voyage on the Beagle, supported Malthus' theory.
E. Malthus theorized that only a fraction of any human population will survive and reproduce. Darwin's observations during his voyage on the Beagle, supported Malthus' theory.
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If two organisms of different species share more similar DNA sequences with each other than with other species, we can conclude that ________.
A. these two species are very closely related B. there is no relationship between similar DNA and how closely related organisms are C. these two species happen to share similar DNA by chance D. these two species are not closely related
Each pollen grain produces two cells, one of which may develop into:a
a polar nucleus. b. a pollen tube. c. an anther. d. a compound pistil. e. a filament.
What evidence would let you know a transfer was unsuccessful?
What will be an ideal response?
Degrade the basement membrane
a. Cadherins B. Pericytes C. Cells D. MMPs