Why is genetic variation critical for evolution?
A. It is required for mutations.
B. It is the source material for natural
selection.
C. It is the same as increased adaptations.
D. It is essential for genetic recombination.
E. It is not critical for evolution.
B
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How do new cyclin proteins appear in the cytoplasm?
A. They are recycled. B. They are made through protein synthesis. C. They are imported from outside the cell. D. All of the above are correct.
When a bacterium is introduced to a new environment with plenty of nutritional resources, binary fission will allow for rapid growth of the population (2-4-8-16-32-64 . . . etc.). However, there is usually a slight lag before the rapid growth begins. What is the best explanation for this lag period?
A. Binary fission becomes more and more efficient after each cell division. B. It takes time to induce and amplify the production of the enzymes needed for binary fission. C. Structural genes act more slowly than metabolic genes. D. It takes time for bacterial cells to duplicate enough organelles to digest new media. E. The new media contains compounds that turn on repressor proteins.
Errors or changes in the DNA of an organism are called ________
Fill in the blank(s) with correct word
With evolution as the core theme of biology, we can explain traits shared by organisms as evidence of ________ and traits that differ among organisms as evidence of ________.
Fill in the blank(s) with the appropriate word(s).