Which hormone causes contraction of the uterus?
a. cortisol
b. oxytocin
c. prostaglandins
d. progesterone
e. estrogen
b
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Which of the following lack chlorophyll and are totally dependent on the host plant for water and nutrients?
A. hemiparasites B. holoparasites C. all plant parasites D. root parasites E. hemiparasites and root parasites
________ hormone is significant in the female menstrual cycle, causing ovaries to become ready for ovulation.
A. Adrenocorticotropic B. Follicle-stimulating C. Growth D. Prolactin
Macromolecules that are used by all organisms to store hereditary information are called:
A. ribosomal RNA molecules. B. transfer RNA molecules. C. messenger RNA molecules. D. DNA molecules. E. proteins.
Which of the following is NOT a true statement regarding the prothallus?
a. It produces eggs. b. It results from a spore that lands on moist soil and grows. c. It is the free-living haploid life stage of a fern. d. It produces sperm. e. It has a conical structure.