Seth ordered lobster at a restaurant and realized that the outer shell was made of a tough carbohydrate similar to that used to make the carapace of a cockroach. What do you think the outer shell of the lobster is made of?
A. Cellulose
B. Glycogen
C. Fibrin
D. Chitin
E. Amylopectin
Answer: D
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Which of the following activates the egg?
A. entrance of sperm into the zona pellucida B. contact of sperm with the outside of the zona pellucida C. contact of sperm with the vitelline envelope D. fusion of sperm and egg membranes E. fusion of sperm and egg nuclei
When reproductive interests between males and females of the same species differ, as in the case of fruit flies, sexual selection may actually favor adaptations arising in one sex but that are detrimental in the other sex
This, in turn, leads to subsequent "counter-measure" adaptations in the sex that are subject to harm or detriment. This kind of antagonistic sexual adaptation has been termed ________ sexual selection. Fill in the blank(s) with correct word
In what part of the cell does a polar signaling molecule bind its receptor? A nonpolar signaling molecule? Explain
your reasoning. What will be an ideal response?
The current state of the revision of "protistan" taxonomy is an example of which feature of good scientific practice?
A) the need to suspend judgment until enough evidence is available to make an informed decision B)base conclusions on controlled, repeatable experiments. C)be willing to change, or drop, one's hypotheses when the data warrant it. D)avoid sampling techniques that can introduce bias. E)Both A and C are correct