Which of the following sex and generation combinations directly produces the fruit of angiosperms?
A) male gametophyte
B) female gametophyte
C) male sporophyte
D) female sporophyte
D
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The oral cavity of humans normally becomes colonized with microorganisms within hours after birth.
Answer the following statement true (T) or false (F)
Your body cells can use _____ as an alternative energy source when glucose is in short supply
a. fatty acids c. amino acids b. glycerol d. all of these
Both male and female gonads function to:
1) produce gametes. 2) produce hormones. 3) transfer gametes. 4) nourish the embryo. 5) influence secondary sexual characteristics. a. answers 1 and 2 b. answers 2 and 4 c. answers 3, 4, and 5 d. answers 1, 2, and 5 e. answers 1, 2, 3, 4, and 5
In a DNA double helix, what kind of chemical bonds form between the complementary nitrogenous bases?
A) polar covalent bonds B) phosphodiester bonds C) nitrogen bonds D) hydrogen bonds