Chapter 43: Q. 29 (page 1260)
Which of the following gives rise to the skin cells? a. ectoderm b. endoderm c. mesoderm d. none of the above
Short Answer
The correct option is a. ectoderm .
Chapter 43: Q. 29 (page 1260)
Which of the following gives rise to the skin cells? a. ectoderm b. endoderm c. mesoderm d. none of the above
The correct option is a. ectoderm .
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Get started for freeSperm are produced in the ________. a. scrotum b. seminal vesicles c. seminiferous tubules d. prostate gland
Describe the phases of the human sexual response.
During cleavage, the mass of cells: a. increases b. decreases c. doubles with every cell division d. does not change significantly
Which of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The trophoblast is a germ layer. c. The inner cell mass is a source of embryonic stem cells. d. The blastula is often a hollow ball of cells.
Which type of short term contraceptive method is generally more effective than others? a. barrier b. hormonal c. natural family planning d. withdrawal
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