In an ectopic pregnancy, implantation occurs
a. in the oviduct.
b. on the outside of the uterus.
c. on the abdominal wall.
d. on the surface of the ovary.
e. anywhere outside the uterus.
E
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Which of the following is a difference between LTR and non-LTR transposition?
A. An mRNA copy of the transposon is synthesized. B. Reverse transcriptase is used to copy the mRNA into DNA. C. The DNA copy of the mRNA is replicated to form a DNA copy of the transposon. D. LTR transposons are primed extrachromosomaly, whereas non-LTR transposons are target primed. E. Copies of the transposons are left in the donor and target sites upon completion for both.
HIV carries an enzyme called reverse transcriptase, which functions to ________
a. penetrate the cell membrane b. copy viral RNA into viral DNA c. copy viral DNA into viral RNA d. destroy the host cell genome
The human ____________ consists of 33 vertebrae that are cushioned with cartilage disks and provide support and protection to the spinal cord.
A. pectoral gridle B. pelvic girdle C. scapula plate D. rib cage E. vertebral column
Two different species of pine release their pollen at different times of the year. This is an example of
A) ecological isolation. B) behavioral isolation. C) mechanical incompatibility. D) geographic isolation. E) temporal isolation.