Collagen fibers are characteristic of which
tissue?
a. muscle
b. epithelial
c. connective
d. nervous
e. glandular
C
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For a tissue or an organ to function as a unit, _____
A) there must be a signal molecule recognized by all cells in the tissue or organ B) there must be cell-cell communication among the cells within a tissue or organ C) the tissue or organ must perform similar functions D) the tissue or organ must be composed of all of the same type of cells
Which of the following organisms produces the toxin associated with St. Anthony's Fire (ergotism)?
A. Claviceps purpurea B. Stachybotrys chartarum C. Aspergillus nidulans D. Amanita phalloides
Dandelions develop seeds by apomixis. What benefits does this strategy provide over vegetative or sexual reproduction?
A. Apomixis provides the benefits of seed dispersal, while maintaining a genome adapted to a given climate. B. Apomixis is beneficial in sheltered areas where wind pollination would be difficult. C. Apomixis is beneficial for plants that attract a diverse mix of bees and other pollinators. D. Apomixis makes the dandelions more resistant to herbicides.
Oxygen crosses a plasma membrane
A) by osmosis. B) through simple diffusion. C) with the help of a nonspecific transporter. D) through facilitated diffusion. E) through porins.