In addition to opposable thumbs, which is another feature of primates adapted to living in a arboreal environment?
a. claws
b. short limbs
c. small brains
d. stereoscopic vision
e. tough epidermal layer
d
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A common environmental organism that may even grow in certain chemical disinfectants is
A. Escherichia coli. B. Streptococcus pneumoniae. C. Pseudomonas aeruginosa. D. enveloped virus.
What is the route of water in the water vascular system of a starfish?
A. Water enters through the madreporite into the ring canal and from thence into the radial canals to the ampullae and finally into the tube feet. B. Water enters the madreporite into the radial canals and from thence into the ring canal, then the ampullae and finally into the tube feet. C. Water enters the madreporite into the ampullae and from thence into the ring canal, then the radial canals to the ampullae and finally into the tube feet. D. Water enters the ampullae and then goes to the tube feet and from thence to the radial canals, then the ring canal, and finally exits through the madreporite. E. Water enters the ring canal, then goes into the radial canals, and finally through the madreporite to the ampullae and tube feet.
The only situation in which a person can survive without one of a pair of chromosomes is:
a. There is no situation in which a person can survive without one of a pair of chromosomes. b. "Super males," Y_, in which a male has only one sex chromosome. c. "Metafemales," X_, in which a female has only one sex chromosome. d. Turner syndrome, X_, in which a female has only one sex chromosome. e. Monosomy 21, in which a person has only one copy of chromosome 21.
In a market economy, a supply restriction occurs when a single firm monopolizes a market
a. true b. false