On which of the following is natural selection based?
a. genotype
b. populations
c. phenotype
d. alleles
e. genes
Ans: c. phenotype
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a. repressor b. terminator c. operator d. promoter e. genes
Four of the five features listed below are
characteristic of the majority of animals. Select the exception. a. multicellular b. make their ATP by fermentation c. usually motile at least during part of their life cycle d. usually diploid with sexual reproduction e. heterotrophic
A nerve is a bundle of nerve fibers or ______
Fill in the blank(s) with the appropriate word(s)
An example of purple photosynthetic bacteria's metabolic flexibility is seen in Rhodospirillum rubrum using a "decision-making" process. When oxygen is present, the bacterium uses fermentation, photoheterotrophy, or photoautotrophy but if oxygen is absent, it switches metabolic pathways to grow chemoorganotrophically.
Answer the following statement true (T) or false (F)