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.
E. an herbicide for killing woody seedlings and dicot weeds.
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When the cell wall is removed from a Gram-negative bacterium without removing the outer membrane, the resulting form is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
A technique that is used to artificially transform a bacterium is called electroporation. Electroporation:
a. exposes cells briefly to rapid pulses of electrical current. b. exposes cells to calcium ions. c. exposes cells to stomes. d. inserts the foreign DNA into the DNA in the chloroplast. e. inserts the foreign DNA into the plant's mitochondrial DNA.
because an spermatogonia has 23 pairs of chromosomes, after the 2 divisions of meiosis the chromosome number is reduced to 11.5 in each sperm and therefore it takes 2 sperm to fertilize 1 egg
a. true b. false
The primary goal of conservation biology is to
A) estimate the total number of species that exist. B) maximize the land set aside for wildlife. C) integrate human culture back into nature. D) counter the loss of biodiversity.