In a population of 100 four-o'clock flowers there are 40 red-flowered plants (CRCR), 38 pink-flowered plants (CRCW), and 22 white-flowered plants (CWCW) what is the frequency of the CW allele in this population?
A. 0.48 or 48%
B. 0.6 or 60%
C. 0.4 or 40%
D. 0.09 or 9%
E. 0.52 or 52%
A. 0.48 or 48%
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Which of the following statements is not true of resin?
A. Resins are produced by many species of conifers. B. Resins deter insects and fungi. C. Some pine resins can be boiled down to produce a sweet syrup. D. Many resins are distilled to produce turpentine and other solvents. E. Some conifer resins are used to produce chemotherapy agents.
The ____ is self-perpetuating embryonic tissue typically found at the tips of shoots and roots
a. ground tissue b. protoderm c. vascular tissue d. meristem e. dermal tissue
Which of the following is the part of the chordate digestive system just posterior to the mouth?
a. pharynx b. neural crest c. oral hood d. notochord e. cranium
If a small blood vessel is torn, ____ will temporarily fill the breach
a. plasma proteins b. leukocytes c. platelets d. erythrocytes e. fibrin