The formation of an infection thread is an important initial part of microbial interactions with plants in the process of ________.
A. nitrogen fixation
B. sulfate reduction
C. denitrification
D. nitrification
Answer: A
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The pre-digestive organ listed above “C” is called
the a. mouth. b. crop. c. gizzard. d. secreting portion of stomach. e. cloaca.
Which statement is true?
A) Hormones travel via specific pathways to specific cells, while electrical signals travel through the blood to all areas of the body. B) Effects of hormones last for brief periods of time, while effects of electrical signals last for long periods of time. C) It takes longer for hormones to be released into the bloodstream and be taken to target cells than it does for electrical signals to be transmitted. D) Hormones have a direct connection with target cells, while electrical signals do not.
Cells form a ________ arrangement when cells in a chain snap back upon each other forming a row of cells oriented side by side.
Fill in the blank(s) with the appropriate word(s).
The development of cauliflower and broccoli from wild cabbage is partly explained by
A. a mutation in a flower development gene that was artificially selected by humans. B. a mutation in a leaf development gene that evolved by natural selection. C. homoplastic convergence of two plant lineages. D. gene duplication and divergence, leading to novel functions. E. a mutation in a Hox gene that was artificially selected by humans.