You dissect a specimen of a vertebrate during an anatomy laboratory. It has the following characteristics: lungs, abundant blood capillaries under thin skin, a partially divided heart, a pulmonary circuit, and four walking legs. What is this animal?
A. placental mammal
B. amphibian
C. marsupial mammal
D. lungfish
E. reptile
Answer: B
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Which of the following statements about oogenesis is false?
A. None of the answer options is false. B. It can take as long as 50 years for some primary oocytes to complete oogenesis. C. Primary oocytes form when a female is a fetus in her mother's uterus. D. Meiotic divisions are asymmetrical in oogenesis. E. Fertilization occurs before the final round of meiotic divisions in humans.
The process by which the major land masses have shifted their positions, changed shapes and separated from each other, is known as
A. Cotranslational sorting. B. Continental drift. C. Depolarization of land masses. D. Differential land movement. E. Cyclic land drift.
The protein-coding region of a eukaryotic gene ____
a. can be amplified directly from the genome b. is obtained by producing a cDNA copy from the gene’s transcript c. contains introns, so an mRNA copy must be produced from the gene’s transcript d. contains exons that are removed by restriction enzymes, while the remaining introns are ligated together e. contains introns that are removed by restriction enzymes, while the remaining exons are ligated together
The longest segment of the gut is the
a. cecum b. small intestine c. esophagus d. colon e. rectum