Sexual reproduction in animals starts with diploid ________ cells that form haploid __________
Fill in the blank(s) with the appropriate word(s).
germ; gametes
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A person in puberty is more likely to have acne
because they
a. sweat more. b. produce more saliva. c. have more surface flora. d. produce more sebum. e. do more than one of these
All of the following are true regarding smoking EXCEPT
a. smoking inhibits the T cells from working properly in the lungs. b. smoking is viewed by many today as being socially unacceptable. c. research shows that the nicotine patch is no more effective than a placebo. d. choosing a "quit date" can increase the chance of quitting successfully.
Which statement best explains why modern Europeans, Asians, or Africans lack Denisovan DNA in their genome?
A. Denisovans never interbred with any population of Homo sapiens. B. Denisovans DNA was eliminated from those populations by strong purifying selection. C. Denisovans interbred only with the population whose ancestors are Melanesians. D. Neanderthal genes and Denisovan genes are incompatible, so modern populations have one or the other. E. Denisovans are an offshoot of hominins that are unrelated to modern humans.
Rachel is pregnant and has morning sickness. She should do all the following EXCEPT
Select one: a. eat dry soda crackers upon waking. b. cook with windows open to dissipate nauseating smells. c. eat large, less frequent meals. d. avoid fatty and fried foods.