Darwin's theory of natural selection to explain evolution is also known as
A. descent with modification
B. inheritance of acquired characteristics
C. uniformitarianism
D. catastrophism
Ans: A. descent with modification
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What is the scientific term for when a plant loses its leaves in the fall, and which hormone triggers this response?
a. thigmotropism, cytokinin b. photomorphogenesis, gibberelins c. abscission, auxins d. dormancy, abscisic acid
Why are organisms with an odd number of chromosome sets usually sterile?
A) Almost all gametes will have an unbalanced set of chromosomes. B) Chromosomes will fail to segregate independently during meiosis I. C) Chromosomes will fail to segregate independently during meiosis II. D) Because an odd number of chromosomal sets is present, meiosis will not occur at all.
The total energy producers store in a given amount of time is referred to as____
a. photosynthetic flow b. primary productivity c. energy flow d. energy production e. biomass flow
The special dyes used in fluorescence microscopy that absorb light at one wavelength and emit light at a different wavelength are called ________.
Fill in the blank(s) with the appropriate word(s).