Infertility affects around one in ________ males.
A) 10
B) 25
C) 50
D) 100
D) 100
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Explain how Mendel’s law of segregation applies to the distribution of alleles in gametes.
What will be an ideal response?
Quality control was performed to determine the validity of urea agar. S. multivorum and E. meningoseptica were used, which yielded positive for S. multivorum and negative for E. menin-goseptica. Which one of the following statements explains this discrepancy?
a. The urea agar is most likely expired. b. The pH is off on the urea agar. c. These two organisms are poor choices for quality control because they are both urea positive. d. No discrepancy is present; the results are valid.
Decapod crustaceans (shrimps, lobsters, and crabs) all lack
A. a carapace, a dorsal cephalothorax shield. B. a ventral line of appendages, swimmerets. C. a tail spine, telson. D. chelicerae.
What is a difference between Chlamydomonas and Ulva?
a. Only Ulva produce flagellated gametes. b. Only Ulva contains carotenoids. c. Only Ulva grows by mitosis after fertilization. d. Only Ulva contains chlorophyll.