A plant's ability to absorb carbon dioxide is reduced when
A. the epidermis is lacking.
B. temperatures are cold.
C. water is plentiful.
D. mesophyll cells lack air spaces.
E. stomata are closed.
Answer: E
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The test cross ab/ab × AB/ab is performed. The following number of progeny of each genotype are obtained:
38% AaBb, 12% Aabb, 12% aaBb, 38% aabb. What is the distance (in map units) between the two genes in question? A. 38 centimorgans (cM) B. 24 centimorgans (cM) C. 19 centimorgans (cM) D. 12 centimorgans (cM) E. 6 centimorgans (cM)
Through studies using the animal cap assay this morphogen was shown to be important for the determination of the different types of mesoderm tissue in the developing embryo.
A. activin B. noggin C. Spemann's organizer D. Hox gene E. cadherins
When individuals of a species do not form close pair bonds, and both males and females mate with multiple partners,
the species’ mating system is described as promiscuous.
a. True b. False
Define the term restriction enzyme, and give two examples of ways in which these enzymes are used
in recombinant DNA technology. What will be an ideal response?