Which of the following individuals argue in favor of the theory of spontaneous generation?
A. Francesco Redi
B. Louis Pasteur
C. John Needham
D. Lazzaro Spallanzani
Ans: C. John Needham
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Parental care of the young is usually associated with species with a type ________ survivorship curve.
A. I B. II C. III D. I or II (depending on the sex ratio) E. I or III (depending on whether the reproductive strategy is iteroparous or semelparous)
The seed coat forms from the _____
a. integuments c. endosperm b. coleoptile d. sepals
The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is
____.
a. 0% b. 25% c. 50% d. 75%
e. 100%Spermatogenesis
A. occurs in the seminiferous tubules. B. begins at birth. C. involves one cell dividing into 4 by mitosis. D. produces a few hundred cells per day.