Only germ cells undergo meiosis, which produces four haploid cells with 23 chromosomes each.
Answer the following statement true (T) or false (F)
True
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Which of the following statements concerning spermatogenesis and oogenesis is incorrect?
a. One primary spermatocyte or one primary oocyte containing 46 chromosomes respectively yields two spermatozoa or two ova, each containing 23 chromosomes. b. There is a continual supply of spermatogonia through mitotic activity. c. The first meiotic division involved in oogenesis is completed just prior to ovulation. d. It takes anywhere from about 11 to 50 years for the process of oogenesis to be completed. e. During oogenesis, there is unequal distribution of cytoplasm resulting in the production of polar bodies that disintegrate.
The refusal to eat because of a fear of being overweight is a condition called ______________________________
Fill in the blank(s) with correct word
All of the following structures in the eye are black, due to the presence of melanin pigment, except
A. the pigmented epithelium. B. the ciliary body. C. the retina. D. the choroid. E. All of these eye structures are black, due to the presence of melanin pigment.
The parasympathetic division arises from the ________ regions of the spinal cord.
A. brain, sacral, and coccygeal B. brain, thoracic, and lumbar C. brain and sacral D. brain, lumbar, sacral, and coccygeal E. sacral and lumbar