How do hagfishes differ from lobe-finned fishes and cartilaginous fishes?
What will be an ideal response?
Hagfishes lack both jaws and bone around the nerve cord.
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Answer the following statements true (T) or false (F)
1. When Schmidt-Nielsen and his colleagues followed a "pulse" of air through the respiratory system of an ostrich, it took two full cycles of inhalation and exhalation for this pulse to pass through and be exhaled. 2. Chemoreceptors for oxygen normally play the most important role in regulating breathing rate. 3. Smaller mammals typically have higher ventilation rates than large mammals. 4. The shape of the oxygen-hemoglobin dissociation curve is a straight line. 5. Asthma attacks result from contraction of the muscles surrounding the bronchioles.
Choose the letter of the best match: Surgical intervention
A. birth control pill B. intrauterine device C. diaphragm D. foams and jellies E. vasectomy
On a class field trip, students swabbed, dug, and dipped samples of life from numerous places around campus. Back in the lab, one of the organisms found was unknown to the professor, or any reference books available, and could not be identified. It came from the edge of a marsh, and the sample smelled of hydrogen sulfide (rotten eggs). The single cells were found to survive only in a container that had sulfate in it, but also had the oxygen removed by burning a candle. This is likely an organism that uses for cellular respiration.
A. lactic acid fermentation B. alcohol fermentation C. only glycolysis D. aerobic respiration E. anaerobic respiration
When comparing recombination rates between a dog with a genome size of 2410 Mb and a mustard weed with a genome size of 100 Mb, which would you expect to have a larger recombination rate per kilobase? Explain your answer
What will be an ideal response?