Human saliva contains which of the following enzymes?
a. aminopeptidase
b. amylase
c. chymotrypsin
d. pepsin
e. trypsin
B
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Which of the following statements about plant and animal development is false?
A. Cell division occurs in discrete regions within the plant body, but tissue differentiation occurs throughout the plant body. B. Cell differentiation and growth occurs throughout the developing animal body. C. Animal cells move during development, whereas plant cells do not. D. In both plants and animals, signaling molecules induce cell differentiation. E. Animal embryos pass through a gastrula stage, whereas plant embryos do not.
Cephalization is:
A. embryonic development of the head in advance of the rest of the body B. concentration of the sensory organs on the posterior end of the body C. concentration of the sensory organs on the anterior end of the body D. an evolutionary degeneration of the head as seen in some parasites E. a malformation of the head
Small RNAs that regulate translation by binding to the leader region of mRNAs are called antisense RNAs.
Answer the following statement true (T) or false (F)
In lakes, the open-water surface layer is called the ____.
A. benthic zone B. abyssal zone C. limnetic zone D. littoral zone E. profundal zone