Do humans exhibit r-selected or K-selected species patterns? Explain your answer. What will be an ideal response?
ANSWER: Humans exhibit almost exclusively K-selected species patterns. We have long development,
later reproduction, few young per breeding episodes, long life spans, and high parental investment. The only question is if we are approaching the carrying capacity like a K-selected
species, or exceeding it like an r-selected species.
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Overexpression of proteins using bacteria :
A. makes subsequent purification of the recombinant DNA harder. B. requires bacterial promoters to be present in the bacterial vector. C. requires eukaryotic promoters to be present in the bacterial vector. D. requires eukaryotic ribosome binding sites to be present in the bacterial vector. E. results in a properly folded, active protein.
The fungus Puccinia graminis causes the disease ____
a. powdery mildew b. wilt c. wheat blight d. wheat stem rust e. flame spot
The animal in the above diagram has
a. an open circulatory system. b. no capillaries. c. a closed circulatory system. d. spaces in the tissues for blood to pool in. e. none of these
Which order do salamanders and newts belong to?
A. Urodela B. Apoda C. Edentata D. Chiroptera E. Anura