During active transport, the solutes in the solution can be described as
a. moving from high concentration to low concentration.
b. moving toward equilibrium.
c. moving from low concentration to high concentration.
d. moving down their concentration gradient.
c. moving from low concentration to high concentration.
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Explain the stages of syphilis. What are the characteristics of and treatments required at each stage?
What will be an ideal response?
Many species in the phylum Crenarchaeota are considered extreme thermophiles or _______, which can grow at temperatures above 100°C.
Fill in the blank(s) with the appropriate word(s).
Who is most noted for being a Greek naturalist who proposed the function of gills in fish?
a. Plato b. Aristotle c. Pliny the Elder d. Sophocles
By what mechanism did allele frequencies change due to the asteroid?
A) Allele frequencies did not change because of the asteroid. B) The asteroid caused mutations in the fish population. C) The asteroid changed the environment, so fish with allele S2 had increased fitness. D) The asteroid killed fish because of their location, so the allele frequency changed by chance.