Refer to Figure 48-1. Which compound is the primary nitrogenous waste product of amphibians?
a. 1
b. 2
c. 3
d. 4
e. 5
D
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Recall that Clements's view of biological communities is that of a highly predictable and interrelated structure, while Gleason's view of biological communities is that individual species operate independently
If we set up many identical sterilized ponds in the same area and allowed them to be colonized, what should we predict if we wished to test Gleason's hypothesis? A) Identical plankton communities will develop in all ponds. B) Similar plankton communities will develop in all ponds. C) Different plankton communities will develop in all ponds. D) Limited plankton communities will develop in all ponds. E) Initially the number of species in each pond will be greater than the number normally found in similar environments.
Which of the following contributes to asymmetric cell division in a developing embryo?
A. diffusible molecules secreted from one cell detected by another cell B. developing gradients of mRNA that define critical axes C. cell division occurring perpendicular to the mRNA gradient D. All of the choices are correct.
Which of the following statements regarding DNA replication is true?
A) Bacterial replication is faster than eukaryotic replication. B) DNA replication during embryonic development occurs at a slower rate than in the early stages of neonatal life. C) Early-replicating genes are those that are not actively transcribed. D) The rate of DNA replication is constant at all stages of development in eukaryotes. E) Cyclin-dependent kinases (Cdk) are not involved in the DNA replication process.
Local signs of infection include.
A) fever and leukocytosis. B) headache and anorexia. C) pain, erythema, and swelling. D) nausea, weight loss, and fatigue.