Which of the following groupings of organs is responsible for the maintenance of water balance in the body?
A) liver, kidneys, hypothalamus
B) heart, liver, posterior pituitary
C) posterior pituitary, hypothalamus, kidneys
D) kidneys, hypothalamus, liver
E) posterior pituitary, bone marrow, kidneys
C
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Nitrogen is used in plant cells to produce which of the following?
A. sugars B. proteins and nucleic acids C. proteins D. sugars and nucleic acids E. nucleic acids
Why are archaea and bacteria—both collections of prokaryotic organisms—grouped into different domains while organisms like fungi and animals are in the same domain?
a. Bacteria and archaea differ significantly in their intracellular organization and structure, but fungi and animals have similar intracellular structure. b. The DNA sequences of bacteria and archaea are more different than animals and fungi. c. Fungi and animals look much more similar than bacteria and archaea. d. Bacteria and archaea differ significantly in their rRNA sequences, but fungi and animals share some rRNA characteristics.
In modern times beer and wine are considered recreational beverages. In the past they were important staples in the human diet, so much so that their consumption is often remarked upon in historical documents. Why were they so important?
What will be an ideal response?
The human disease xeroderma pigmentosum results from mutations in genes involved with
a. recombination-repair b. photoreactivation c. base excision repair d. mismatch repair e. nucleotide excision repair