The heart is a(n) ________ composed mainly of ________ tissue?

A. tissue; connective
B. organ; connective
C. organ; muscle
D. tissue; epithelial
E. organ; epithelial


Answer: C

Biology & Microbiology

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A compound similar to auxin, 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), has been used  

A.  as a fertilizer for corn and wheat. B.  as a spray to promote flowering of pineapple. C.  as an organic substitute for chlorine bleach. D.  to detoxify the dangerous poison dioxin. E.  an herbicide for killing woody seedlings and dicot weeds.

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Purple loosestrife, Lythrum salicaria, is a beautiful, long-stemmed wetlands species brought to the United States from Europe as an ornamental plant

In the United States, it has no predators and crowds out cattails, Typha latifolia, another wetlands plant that's a valuable resource for many species. Purple loosestrife is an example of A) an introduced species. B) a parasite. C) a predator. D) overexploitation.

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A second messenger, such as cyclic AMP, carries a hormonal signal to molecules inside a cell

Indicate whether the statement is true or false

Biology & Microbiology

Only the LDCs will be experiencing overpopulation growth in the near future.

Answer the following statement true (T) or false (F)

Biology & Microbiology