Which of these statements about eicosanoid synthesis is true?

a) an early step in the path to thromboxanes is blocked by ibuprofen.
b) arachidonate is derived mainly by hydrolysis of triacylglycerols.
c) aspirin acts by blocking the synthesis of arachidonate.
d) plants can synthesize leukotrienes, but humans cannot.
e) thromboxanes are produced from arachidonate via the "linear" path.

What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

How would this hypothesis different from the scientific law a. increases gene flow b. eliminates fixed alleles c. allows divergence to occur d. stops adaptive radiation