Answer the following statements true (T) or false (F)
1.The polar body formed after meiosis I becomes the egg cell.
2.Oogenesis is the formation of a diploid germ cell that divides into primary oocytes.
3.Pregnant women undergo strenuous processes during childbirth collectively known as labor.
4.Prolactin is the hormone that stimulates contractions during labor.
5.An intrauterine device (IUD) prevents pregnancy by blocking the sperms from entering into the vagina.
1.FALSE
2.TRUE
3.TRUE
4.FALSE
5.FALSE
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Gene therapy has been successful in curing some individuals of autoimmune disorder and sickle cell
disease.
Indicate whether the statement is true or false.On average, how many red blood cells are there in a microliter of blood?
a. 5,000 b. 50,000 c. 500,000 d. 5,000,000 e. 50,000,000
Assume that several members of a particular species of mosquito inadvertently entered an airplane in Asia and were transported to the United States, where they thrived as an isolated colony. What is likely to occur over time?
a. The isolated species will breed with closely related species in the United States, forming a new species. b. The species undergo sympatric speciation. c. The colony could genetically diverge in isolation and a new species could be formed. d. Genetic divergence of the population would eventually cease. e. Isolation would encourage extinction.
Which of the following best describes sensory transduction?
A. The analysis of a nerve impulse by the brain. B. The conversion of a stimulus into a nerve impulse by using a receptor. C. The detection of an environmental stimulus by a nerve receptor. D. The conversion of a nerve impulse into a stimulus by using a receptor.