You find an organism that possesses chaetae and nephridia and exhibits coordinated movements of circular and
longitudinal muscle. What is it most likely to be?
a. Millipede
b. Tapeworm
c. Polychaete
d. Hookworm
e. flatworm
ANSWER: c
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Represented by only one living genus, Equisetum, these seedless vascular plants have leaves in whorls
around a photosynthetic stem that is stiff and gritty because they accumulate silica in their tissues
a. mosses b. whisk ferns c. ferns d. club mosses e. horsetails
Previous experiments have not conclusively demonstrated XFF is the alien epinephrine, so you decide to investigate other XFF properties using radioactive XFF. Which of the following XFF behaviors confirm that XFF is similar to estrogen?
A) XFF binds only to the cell surface. B) XFF diffuses into the cell cytoplasm. C) XFF is internalized by receptor-mediated endocytosis. D) Ryanodine blocks the interaction of XFF with cells. E) Opioids block the interaction of XFF with cells.
When a phosphate group is removed from an ATP molecule, energy is released.
a. true b. false
This system transforms food particles into a size that can be absorbed.
What will be an ideal response