Endosperm is found in
A. ferns.
B. mosses.
C. gymnosperms.
D. horsetails.
E. angiosperms.
Answer: E
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As a naturalist, you are responsible for training volunteers in the identification of the types of amphibians. The volunteers will use this information to correctly describe the animals to school groups that will visit your nature center. The training documentation for the volunteers lists important characteristics of the different groups of amphibian, but you notice that one of the items on the list is incorrect. Indicate which description is not correct.
A. Frogs and toads have external fertilization whereas salamanders and caecilians have internal fertilization. B. Frogs, toads, and most salamanders have four legs whereas caecilians are legless. C. Frogs and toads lay eggs whereas some caecilians lay eggs and others give birth to live young. D. Salamanders and caecilians have external tails whereas frogs and toads do not. E. Adult frogs, toads, and salamanders are predators of insects and other small animals whereas caecilians are herbivores.
In a person with cystic fibrosis, the CFTR mutation causes the protein to be ____
a. embedded in the plasma membrane b. destroyed in the endoplasmic reticulum c. shuttled to the nuclear membrane instead of the plasma membrane d. shuttled to the plasma membrane instead of the nuclear membrane e. expelled from the cell by exocytosis before it can do its job
Which mechanism results in changes in allele frequencies in a population from one generation to another?
a. gene flow b. mutation c. genetic drift d. natural selection e. disruptive selection
What type of staining would you perform if you suspected a sample contained Mycobacterium Leprae?
A) Acid-fast staining B) Endospore staining