The theory of aging that posits that aging is caused either by the accumulation of deleterious mutations later in life or by a trade-off between repair to damaged tissues and reproduction is called the ________
A) theory of senescence
B) rate-of-living theory of aging
C) evolutionary theory of aging
D) particulate theory of aging
C
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One of the two strains of Streptococcus pneumoniae isolated in the 1920s was surrounded by a ____________________, giving it the ability to evade the immune system and cause pneumonia
Fill in the blank(s) with correct word
The spinal cord is part of the ________ nervous system.
A. somatic B. autonomic C. peripheral D. central
Which statement describes ovaries and egg cells?
A. A woman with only one ovary cannot conceive. B. The ovaries produce eggs and manufacture sex hormones. C. The ovaries are connected directly to the fallopian tubes. D. The eggs cannot be fertilized outside the fallopian tubes.
A human individual is phenotypically female, but her interphase somatic nuclei do not show the presence of Barr bodies. Which of the following statements concerning her is probably true?
A) She has Klinefelter syndrome. B) She has an extra X chromosome. C) She has Turner syndrome. D) She has the normal number of sex chromosomes. E) She has two Y chromosomes.