Kelps of the genus Macrocystis are perennials
Indicate whether the statement is true or false
T
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In sickle cell anemia, the defective hemoglobin differs from the normal hemoglobin by
A. the color of the pigment. B. the size of the molecule. C. a single amino acid substitution. D. the total number of amino acids. E. the type of blood cell it is found in.
Leishmaniasis is transmitted through the bite of a(n) ________.
A. Anopheles mosquito B. sand fly C. tsetse fly D. hard-bodied tick E. reduviid "kissing" bug
In species that reproduce via external fertilization:
a. males do not have to compete with each other for access to a female's eggs b. only females provide parental investment, in the form of the nutrition present in the egg c. sexual selection does not operate d. sperm and egg encounter each other outside of the female's body, typically in an aquatic environment e. none of these
The organization of blood and water flow in a fish's gills increases the fish's ability to
A) extract oxygen from the water. B) extract carbon dioxide from the water. C) detect toxic materials in the water. D) transport blood throughout the fish's body.