Peptide hormones, amino acid-derived hormones, and steroid hormones are types of
A) hormone receptors.
B) neurotransmitters.
C) endocrine hormones.
D) paracrine hormones.
E) local hormones.
C
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Ovules mature into _________, while ovaries mature into _____________ .
(a) seeds/fruits. (b) stamens/seeds. (c) seeds/carpels. (d) fruits/seeds.
Which of the following statements about oogenesis is false?
A. None of the answer options is false. B. It can take as long as 50 years for some primary oocytes to complete oogenesis. C. Primary oocytes form when a female is a fetus in her mother's uterus. D. Meiotic divisions are asymmetrical in oogenesis. E. Fertilization occurs before the final round of meiotic divisions in humans.
Of the following specialized procedures, which may be used with the electron microscope?
A) shadowing with gold B) negative staining C) scanning electron microscopy D) freeze fracturing E) all of the above
An epithelium is attached to the underlying surface by ________
a. gland cells b. microvilli c. connective tissue d. the basement membrane