On a remote island, a new animal is found. It has a four-chambered heart and lungs and is endothermic. It has internal fertilization, lays shelled eggs, and nurses its young after they hatch. This animal is most likely a(n)
A) monotreme. B) reptile. C) amphibian. D) coelacanth. E) marsupial.
A
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Which of the following is not a function of the complete digestive tract? a. Food enters and wastes leaves through the same opening
b. Mechanically moves digested material to the next segment. c. Breaks down food mechanically. d. Absorption of digested material through the lining of the gut. e. Secretion of digestive enzymes.
The significance of the Hershey and Chase
experiments in which 32P and 35S were used is that a. DNA labeled with 35S and proteins labeled with 32P can be traced in the course of an experiment. b. they demonstrated that DNA labeled with 32P is transferred from the bacteriophage to the virus. c. they established that proteins labeled with 35S become deactivated and unable to be transferred. d. they demonstrated that bacteriophages transfer their DNA, not their protein coats, into their hosts. e. DNA may be the hereditary material; although, bacteriophages transfer both DNA and proteins into their hosts.
Which of the following descriptions applies to megaphylls?
A. can be found in both the pteridophytes and seed plants B. evolved around 370 MYA C. are broad leaves with branched veins D. allowed early plants to photosynthesize more efficiently E. All of the answer choices apply to megaphylls.
Which of the following characterizes relatively K-selected populations?
A) offspring with good chances of survival B) many offspring per reproductive episode C) small offspring D) a high intrinsic rate of increase E) early parental reproduction