Birds are one of two groups of flying vertebrates (bats are the other). Their adaptations to flight include (select all that apply)
A. hollow bones.
B. heavy jaws.
C. a method of breathing that extracts much
oxygen from each breath.
D. efficient kidneys that remove metabolic
wastes more quickly than is the case in other
vertebrates.
E. none of these.
A,C
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Glucose is transported from the intestinal lumen into epithelial cells through _____ and from the intestinal epithelium into circulation by _____
A) facilitated diffusion; primary active transport B) cotransport with sodium; cotransport with sodium C) cotransport with sodium; facilitated diffusion D) active transport; active transport
Intercalating agents
A. act during DNA synthesis. B. often result in frameshift mutations. C. only act in dormant cells. D. alter the hydrogen bonding properties of the bases. E. act during DNA synthesis AND often result in frameshift mutations.
Answer the following statement(s) true (T) or false (F)
1. Protist locomotion is accomplished by the contraction of muscle fibers. 2. Pollination and fertilization are essentially the same process. If pollination occurs, fertilization will follow quickly. 3. After fertilization the zygote continuously develops until an embryonic plant is formed within the seed. 4. All gymnosperms have needle-like leaves and produce some type of resin. 5. In seed plants the sporophyte has been greatly reduced in size and is typically just a few cells.
Which of the following adds RNA nucleotides, one at a time, during transcription?
a. RNA polymerase b. DNA polymerase c. RNA nuclease d. transfer RNA e. ribosomal RNA