Removal of which of the following would have the most wide-reaching effect on bodily functions of an adult human?
A. adrenal glands
B. pituitary gland
C. thyroid gland
D. ovaries (in female) or testes (in male)
B
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Which group of tiny marine organisms have the simplest body and smallest genome of all modern animals?
a. sponges b. choanoflagellates c. placozoans d. cnidarians e. flatworms
What type of DNA supercoiling is the most common?
What will be an ideal response?
Certain researchers have published peer-reviewed reports that the use of zinc lozenges reduces the length and severity of cold symptoms. Why are some scientists still skeptical about the merits of using zinc lozenges during a cold?
A) Most people get zinc in their diet so extra zinc lozenges may not affect a cold. B) Ideas about vitamin C have been discredited, so zinc will also be ineffective. C) There is no way of knowing if the original work was properly controlled. D) There may be other reasons why the people taking zinc lozenges recovered faster.
Gas exchange in terrestrial insects is accomplished through:a
the use of gills. b. the use of tracheae. c. the use of book lungs. d. a closed circulatory system. e. diffusion across the epidermal layer.