Most human embryos that are aneuploid
A. result in Down's syndrome.
B. result in sterility.
C. are spontaneously aborted in the first trimester.
D. can develop and survive to adulthood.
E. are usually the result of increased nondisjunction in the gametes of older men.
C. are spontaneously aborted in the first trimester.
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The region of soil in the immediate vicinity of the roots of plants is called the ________.
A. phyllosphere B. plant crust C. rhizosphere D. microbivory
Which of the following is NOT a domain?
A. Eukarya. B. Archaea. C. Protista. D. Bacteria. E. Both Bacteria and Protista.
A community
a. includes all populations of all species in a given area.
b. features the living organisms interacting with the physical and chemical environment. c. is the sum of all places in Earth's atmosphere, crust, and waters where organisms live. d. includes members of only one species. e. is at a higher level of organization than an ecosystem.
Which best describes the protective action of blinking?
A) An interneuron detects motion and sends this message to the peripheral nervous system (PNS), and the PNS sends a message back to blink. B) A sensory receptor detects motion, a sensory neuron sends this information to the spinal cord, and the information in the central nervous system (CNS) sends a message back to blink. C) A cell body detects motion, a sensory neuron sends this message to the peripheral nervous system (PNS), and the PNS sends a message back to blink. D) A cell body detects motion, a sensory neuron sends this message to the spinal cord, and the information in the central nervous system (CNS) sends a message back to blink.