The experiments that demonstrated that meat does not spontaneously generate maggots were conducted by
A) Francisco Redi.
B) Harold Urey.
C) Louis Pasteur.
D) Sidney Altman.
E) Alexander Oparin.
A
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The implanted blastula prevents ________ by secreting the hormone ________
a. menstruation, HCG b. gastrulation, HCG c. cleavage, progesterone d. menstruation, progesterone e. menstruation, estrogen
Select all of the following that are characteristics of crustaceans.
_____ two pairs of antennae. _____ antennal glands. _____ maxillary glands ._____ calcium carbonate deposited in the exoskelton. _____ external fertilization.
Maternal and paternal chromosomes are shuffled most during
a. anaphase II. b. metaphase I. c. prophase I. d. telophase II. e. interphase.
During Krebs cycle reactions, the waste product gas ____________________ is produced. Fill in the blank(s) with the appropriate word(s)