What were Darwin's two fundamental insights about the process of evolution?
a. The environment selects on variation in the traits of individual organisms; and organisms are in a constant struggle for existence.
b. The environment selects on variation in the traits of individual organisms; and all species have descended from one or a few common ancestors.
c. All species have descended from one or a few common ancestors; and over time populations, not individuals, evolve.
d. Over time populations, not individuals, evolve; and evolutionary change is connected to envi-ronmental fit.
B
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________ is an intramolecular post-translational process that allows for self-catalytic removal of specific amino acid sequences
Fill in the blank with correct word.
What are the three events that occur in sexual reproduction that increase genetic variability?
What will be an ideal response?
In bacteria, the first amino acid inserted into a polypeptide as translation is initiated is?
a. formyl-methionine b. methionine or formyl-methionine c. methionine d. alanine
Creutzfeldt-Jakob disease is
A. a spongiform encephalopathy of humans. B. also called "Mad Cow disease". C. caused by a chronic latent virus. D. caused by a viroid. E. initiated by an oncogenic virus.