Which of the following statements about early embryonic development in humans is false?
a. The embryo is moved along the oviduct by ciliary action and muscular contraction.
b. The embryo develops through the blastula stage while floating free in the uterus.
c. The embryo enters the uterus about 24 hours after fertilization.
d. Early division of the embryo occurs in the oviduct.
e. Implantation of the embryo occurs about seven days after fertilization.
C
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In which year does it appear that the climate was most conducive to growth?
a. 2009 b. 2010 c. 2011 d. 2012
Antidiuretic hormone (ADH) and aldosterone both help to control the composition of urine.
a. true b. false
Carl Woese is BEST known for discovering that ________
A) eukaryote membrane-bound organelles are descended from endosymbionts B) the oldest fossils are 3.4 billion years old C) prokaryotes comprise two very different branches: Bacteria and Archaea D) energy acting on gases and water vapor will create a "primordial soup" of organic molecules E) the last universal common ancestor (LUCA) did not have DNA-dependent RNA polymerase
In replication, once the DNA strands have been separated, reformation of the double helix is preventedby:a
DNA helicase enzyme. b. single-strand binding proteins. c. DNA polymerases. d. ATP. e. GTP.