Which of the following is a function of the cell membrane?
A. breaks down lipids, carbohydrates, and proteins from foods
B. stores water, salt, proteins, and carbohydrates
C. keeps the cell wall in place
D. regulates the movement of materials into and out of the cell
Ans: D. regulates the movement of materials into and out of the cell
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How could you test whether the association between leafcutter ants and antibiotic-producing fungi represents an obligate mutualistic relationship for the fungi?
a. test how long the mutualistic fungi can survive on ants b. test whether the antibiotics produced by the fungi are specific to the ants' fungal gardens c. test whether the fungal species found on ants can survive without the ants d. conduct a survey to find other fungi that are also associated with the ants
The process of removing introns from mRNA and joining exons together occurs in a complex called the ____
a. ribosome b. anticodon c. lariat d. polysome e. spliceosome
An important functional role of the endocrine system is to
a. provide mechanisms for rapid responses to changes in the body. b. allow for mechanisms to control gene action. c. inhibit nervous system action on muscles and glands. d. maintain a constant, yet dynamic internal fluid environment. e. fight infection.
Which of the following has only one living species characterized by fan-shaped, deciduous leaves?
a. Conifers b. Ginkophytes c. Cycads d. Gnetophytes