What relationship between prairie dogs and mesquite is suggested by this experiment?
a. Prairie dogs and mesquite appear to be unable to co-exist.
b. Mesquite seems to preclude establishment of prairie dog communities.
c. Prairie dog communities seem to preclude the establishment of mesquite.
d. All of the above.
d
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Helper T cells secrete ____, which activate B cells and stimulate their proliferation
a. antigens b. allergens c. antibodies d. interferons e. interleukins
What two atoms are found in all organic
compounds?
a. carbon and hydrogen b. carbon and oxygen c. oxygen and hydrogen d. carbon and phosphorous e. oxygen and sulfur
Types of Symbiosis
What will be an ideal response?
Nonfunctional product of oogenesis produced by the unequal division of cytoplasm in females during meiosis; in humans three of the four cells produced by meiosis are polar bodies.
What will be an ideal response?