A chromosomal mutation where a segment breaks off, flips, and then reattaches itself is called a(n):
A. inversion.
B. duplication.
C. translocation.
D. deletion.
E. reciprocal translocation.
B
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After looking at the experiment in the figure above, what can be said about productivity in marine ecosystems?
A) Nothing can be said based on this information. B) Marine organisms break down iron for energy and thus for productivity. C) Iron can be a limiting nutrient in productivity. D) Productivity increases when chlorophyll a is added.
A ________ layer consists of diffuse unorganized polysaccharide material that lies outside the cell wall and is easily removed.
Fill in the blank(s) with the appropriate word(s).
The maintenance of a high ATP to ADP ratio within cells ensures that the:a
hydrolysis of ADP to ATP will be strongly exergonic. b. hydrolysis of ATP to ADP will be strongly exergonic. c. hydrolysis of ATP to ADP will be strongly endergonic. d. hydrolysis of ADP to ATP will be an energy releasing reaction. e. conversion of ADP to ATP will proceed spontaneously.
Seedless vascular plants of the ________ period formed the world's coal, oil, and natural gas deposits.
A. Carboniferous B. Cambrian C. Cretaceous D. Jurassic E. Quaternary