For diffusion to occur, there must be
A) a gradient. B) water. C) ATP. D) a membrane.
A
You might also like to view...
The activities of cells in different layers of the tubular gastrointestinal tract are regulated by clusters of nerves located in the submucosa. These nerve complexes are called
A. villi. B. serosa. C. epithelia. D. plexuses. E. muscularis.
Comparisons between the cytochrome b protein sequence in the honeycreeper versus the deer mouse and the Gough
Island finch reveals eighteen and four amino acid differences, respectively. Therefore, _____.
a. the honeycreeper is more closely related to the deer mouse b. the honeycreeper and the Gough Island finch are the same species c. the honeycreeper is more closely related to the Gough Island finch d. no DNA mutations have occurred during the evolution of the honeycreeper e. the DNA sequences of all three species are identical
A frog that lacks chemical defenses, yet resembles a poison arrow frog, would exhibit:a
Batesian mimicry. b. mutualism. c. camouflage. d. Müllerian mimicry. e. epistasis.
Pollination and fertilization are essentially the same process. If pollination occurs, fertilization will follow quickly.
Answer the following statement true (T) or false (F)