The feature of Darwin’s finches that shows variation
is
a. feet.
b. beaks.
c. feathers.
d. structure of eggs.
e. all of these.
Answer: b
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Most intertidal chitons are considered
a. grazers. b. predators. c. scavengers. d. filter feeders. e. infauna.
A hypothetical restriction sequence is 5?-TCTAGA-3?. The palindromic sequence is 3?-________-5?
Fill in the blank(s) with correct word
HIV may be transmitted from one individual to another by holding hands
Indicate whether the statement is true or false
One important difference between covalent and ionic bonds is that:
A) ionic bonds are much stronger than covalent bonds. B) in ionic bonds, two atoms share electrons, whereas in covalent bonds, one atom gives one or more electrons to the other atom. C) in covalent bonds, two atoms share electrons, whereas in ionic bonds, one atom gives one or more electrons to the other atom. D) in ionic bonds, both protons and electrons can be shared, whereas in covalent bonds, only electrons can be shared. E) ionic bonds only occur among water-soluble elements.