__________ occurs when two species act as agents of selection upon one another. Fill in the blank(s) with the appropriate word(s)
ANSWER: Coevolution
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A stool specimen is examined, and the following characteristics are observed: • 15 to 18 lateral branches on each side • Scolex with four suckers • No hooklets The intermediate hosts of this tapeworm are:
a. cattle. b. humans. c. cats. d. swine.
The suffix -itis means ________.
A. blood B. a disease or morbid process C. pertaining to D. tumor E. an inflammation
Comb shape in chickens represents one of the classic examples of gene interaction. Two gene pairs interact to influence the shape of the comb. The genes for rose comb (R) and pea comb (P) together produce walnut comb. The fully homozygous recessive
condition (rrpp) produces the single comb. Assume that a rose-comb chicken is crossed with a walnut-comb chicken and the following offspring are produced: 17 walnut, 16 rose, 7 pea, and 6 single. What are the probable genotypes of the parents? A) rrPP × RRpp B) rrpp × RrPp C) Rrpp × RrPp D) RRPP × Rrpp E) RrPp × RRPP
Choose the letter of the best match from the following:A. protodermB. vascular cambiumC. apical meristemD. procambiumE. ground meristemLateral meristem that contributes to the increase in thickness of a stem or root.
Fill in the blank(s) with the appropriate word(s).