Which of the following is not predicted by a Punnett square?
1.the expected genotypic ratio of the offspring
2.the expected phenotypic ratio of the offspring
3.the number of offspring that will result
4.none of these; all are predicted
3
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Uric acid produced by insect Malphigian tubules does not influence the movement of water from the hindgut because:
A. it is eliminated by the tubules before water reaches the hindgut. B. it precipitates due to the low pH of the fluid in the rectum and therefore does not contribute to osmotic pressure. C. water moves only in response to the osmotic pressure created by proteins and sugars in the hindgut. D. uric acid is equally concentrated in the hindgut and in the body fluids. E. None of these choices are correct.
Which of the following best distinguishes between annuals, biennials, and perennials?
A. how tall they grow B. the number of flowers they produce C. the amount of root development D. the environment they grow in E. the time from seed germination to seed production
Which statement about bryophytes is NOT
true?
a. The sporophyte is diploid. b. The sporangium produces gametes. c. The sporophyte is dependent upon the gametophyte. d. Mitosis precedes gamete formation. e. Sportophytes are formed by mitosis
A 30-year-old woman was hospitalized after she experienced convulsions. On examination, she was alert and oriented and complained of a fever, headache, and stiff neck. Any of the following organisms could be responsible for her symptoms EXCEPT
A) Clostridium botulinum. B) Listeria monocytogenes. C) Haemophilus influenza. D) Streptococcus pneumoniae. E) Any of these organisms could be the causative agent.