Create a list of macromolecules that make up and maintain living organisms.
_____ Amino acids
_____ Proteins
_____ Carbohydrates
_____ Vitamins
_____ Lipids
_____ Nucleic acids
_____ Amino acids
__X__ Proteins
__X__ Carbohydrates
_____ Vitamins
__X__ Lipids
__X__ Nucleic acids
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The role of a sphincter is to
a. control the passage of materials. b. create a churning motion. c. propagate peristalsis. d. absorb excess water from feces. e. do more than one of these
Answer questions 58–61 by using the five numbers below
a. 10 b. 20 c. 40 d. 60 e. 80 M 58. How many sperm would eventually be produced from 20 spermatids? M 59. How many sperm would eventually be produced from 20 primary spermatocytes? M 60. How many ova (eggs) would eventually result from 20 secondary oocytes? M 61. How many ova (eggs) would eventually result from 20 primary oocytes?
Testosterone
a. stimulates spermatogenesis. b. promotes the normal development and maintenance of sexual behavior. c. is responsible for the development of male secondary sexual characteristics. d. is responsible for the development of the male genitalia. e. does all of these.
Nutritional mutants in Neurospora can be "cured" by treating the medium with substances in the defective metabolic pathway. What determines whether the mutant strain (auxotroph) is "cured" by a particular substance?
What will be an ideal response?