Usually, the alleles are written in pairs to reflect that each individual has two alleles for every gene, one from each parent, such as PP, Pp, or pp. These symbols are called the ______.
Fill in the blank(s) with the appropriate word(s).
Genotype
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Based on the phylogenetic tree shown, which of the following is a correct statement of evolutionary relationships?
A. A snake is equally related to a bird and a crocodile. B. A snake is more closely related to a crocodile than to a turtle. C. A snake is more closely related to a crocodile than to a bird. D. A snake is more closely related to a bird than to a crocodile. E. A snake is more closely related to a frog than to a human.
You are working on a drug to affect heart function, and you are told to direct the drug to change the relaxation of the ventricles. If your drug is successful, it will alter
A. the oxygen content in the blood. B. the force of contraction of the atria. C. venous pressure. D. diastolic pressure. E. systolic pressure.
Opening of the stomata:a
occurs during prolonged periods of drought. b. occurs when there is a high concentration of carbon dioxide in the leaf. c. is under hormonal control. d. is triggered by darkness. e. is controlled by the changes in shape of the companion cells.
Individuals with asthma should exercise in cold weather whenever possible.
a. true b. false