What follows from the fact that reabsorption of salt increases the osmolarity of the blood compare with the filtrate?
What will be an ideal response?
Answer: water moves passively from the tubule into the blood
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A horticulturist is breeding a new variety of houseplant in which two genes control leaf color. G (allele for green) is dominant to g (yellow) and B (second allele for green) is dominant to b (yellow). The recessive homozygous condition of either gene will mask a dominant allele. What color is a plant with the genotype GgBb? rev
A. green B. yellow C. an intermediate yellow-green D. variegated (yellow and green spots or stripes) E. The color cannot be determined with the information given.
Horizontal gene transfer is less prevalent in eukaryotic species because
A. of the presence of organelles in the cells of eukaryotic species. B. of the multicellularity in eukaryotic species, which is lacking in prokaryotic species. C. eukaryotic species reproduce by sexual reproduction. D. of multicellularity and sexual reproduction. E. of the presence of organelles and multicellularity.
To know that the 13 finch species that inhabit the Galápagos are descended from a common ancestor,
biologists had to rely on ____.
a. Darwin's notebooks describing his observations b. comparative molecular biology c. comparative embryology d. Mendelian genetics e. modern historical biogeography and Darwin's observations
Bacteria typically have _______, whereas eukaryotes have _______.
a. one chromosome that is circular; many chromosomes that are linear b. several chromosomes that are circular; many chromosomes that are linear c. one chromosome that is linear; many chromosomes that are circular d. two chromosomes that are circular; eight chromosomes that are linear e. None of the above