What limits phytoplankton growth in streams?
A. Turbidity
B. Light blocked by overhanging foliage
C. Rapid flow and mixing of water
D. All of the choices are correct.
Answer: D
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Protein denaturation can
A. occur due to certain chemicals. B. occur due to pH changes. C. occur due to high temperature. D. cause the protein to no longer function. E. All of the choices are correct.
Answer the following statements true (T) or false (F)
1. In red-winged blackbirds, females tend to choose males with the most desirable territories and males compete with each other for territories. Redwing blackbirds demonstrate both intersexual selection and intrasexual selection. 2. Cryptic female choice is a type of intrasexual selection. 3. A population undergoing microevolution would show Hardy-Weinberg disequilibrium. 4. The Mexican axolotl (Ambystoma mexicanum) is an amphibian that has a derived mode of development characterized by metamorphic failure. This mode of development results in an entirely aquatic life cycle and is an example of paedomorphosis.
Which of the following characterize biofilms that form within the body?
A. Biofilms protect microorganisms from antibiotics. B. Biofilms help microorganism adhere to human tissue. C. Biofilms are usually made up of only one species of bacteria. D. Biofilms are formed only by Gram-positive bacteria. E. Biofilms protect microbes from the body's defenses.
Local cave explorers, returning from a recent expedition, reported discovering piles of dead bats with white froth around their mouths that they believed to be indicative of an outbreak of rabies. Subsequent testing revealed the ‘”froth” was actually a fungus, and the bats were in fact afflicted with white-nose syndrome. What species of fungus causes white-nose syndrome?
a. Histoplasma capsulatum b. Batrachochytrium dentrobatidis c. Pseudogymnoascus destructans d. Botrytis cinerea