A dispersion pattern refers to ________.
A. the density of organisms in a habitat
B. the spacing of organism throughout a habitat
C. the diversity of species found in a habitat
D. the extinction rates of a species
Answer: B
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Match the following items with the correct phrases.
_______1. A protein that plays a role in DNA replication. _______2. The end product of transcription. _______3. A protein that plays a role in transcription. _______4. The location of codons. _______5. The location of anticodons. _______6. An integral part of ribosomes, whether or not they are participating in protein synthesis. _______7. Produced in the nucleolus of eucaryotic cells. _______8. The molecule responsible for “activating” amino acids, thus enabling them to be added to the growing polypeptide chain. a. DNA polymerase b. RNA polymerase c. mRNA d. rRNA e. tRNA
When cyclin binds Cdk,
a. the cell transitions from G2 to S. b. kinase activation occurs. c. chromosomes condense. d. the cell quickly enters M phase. e. the cell begins apoptosis.
Before mitosis, chromosomes appears as
A) microtubules. B) matrix. C) chromatin. D) spindle fibers.
After Darwin concluded his voyage on the Beagle, he proposed that the process of natural selection was a mechanism for
A. evolution. B. overpopulation of finches on the Galapagos Islands. C. artificial selection. D. speciation. E. sexual selection.