If a cross of two traits shows a 9:3:3:1 ratio, you know the organism was what?
A. Both heterozygous
B. Both homozygous
C. One of each
Answer: A. Both heterozygous
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The DNA template ATGCGTTA is transcribed into an RNA strand with the sequence
A) TACGCAAT. B) UAACGCAU. C) UACGCAAU. D) AUGCGAAU.
In general, the blastomeres of the _____ form the endodermal tissues.
A. membrane B. equator region C. vegetal pole D. animal pole
Herpes and other enveloped viruses enter their host cells ____.
A. through pores B. by dissolving the host plasma membrane C. by fusion of the viral membrane with the cell’s plasma membrane D. by activating transport proteins in the host cell’s plasma membrane E. by engulfing the host cell
The anterior pituitary gland receives hormone messages from the hypothalamus via ________.
a. a capillary network b. neurons that extend from the hypothalamus to the pituitary c. Schwann cells d. both a & b