Embryonic stem cells derived from blastocysts are called pluripotent because they ________
A. are viable under a wide range of laboratory conditions
B. can form most cells, tissues, and organs of the human body
C. can form all cells, tissues, and organs of the human body
D. are viable under a wide range of laboratory conditions and can form most cells, tissues,
and organs of the human body
E. are viable under a wide range of laboratory conditions and can form all cells, tissues, and
organs of the human body
C
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Before Darwin published his work, Lamarck and others had suggested mechanisms for evolution. By what means did Darwin propose species evolved over time?
A. Overproduction of young B. Natural selection C. Survival of the strongest D. Passing on acquired traits
Living as a member of a group may have all of the following advantages except what?
A. being more resistant to disease and parasites B. increased feeding rate C. greater protection from predators D. members learn about new food sources from other members E. more individuals scan the environment for dangers
_____ are suspensions of fine dust or moisture in the air that contain live pathogens, whereas droplets are dried microscopic residues ejected from the mouth and nose.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not true about ferns?
a. their gametophytes and sporophytes are both photosynthetic b. their sporophytes are much smaller than the gametophytes c. their underground stem is called a rhizome d. their leaves are called fronds e. clustered, stalked sporangia called sori arise on the backs of the fronds