The process of producing food from inorganic compounds using high energy compounds as a source of energy is called:
a. photosynthesis.
b. chemosynthesis.
c. heterotrophy.
d. grazing.
e. solar irradiation.
B
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The study on mutations in germ-line cells indicates all of the following EXCEPT
a. some mutations are inherited from our parents b. some mutations arise as new mutations in the germ-line c. the mutation rates are the same in all families d. more families need to be studied to draw any real conclusions e. this information can be used in medical research
Which tissue is composed of spindle-shaped contractile cells that are commonly found in the walls of tubular organs such as blood vessels?
a. squamous epithelium b. smooth muscle c. skeletal muscle d. cardiac muscle e. adipose tissue
Which type of cell does not have a cell wall?
a. animal b. plant c. bacteria
What structure do lobsters use for gas exchange?
A) gills B) lungs C) skin D) tracheae