Animals with radial symmetry have a mesh of interconnected neurons called a:
a. nerve
b. nerve cord
c. nerve net
d. ganglia
e. brain
c
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Even though bacteria lack membrane-bound organelles, such as chloroplasts and mitochondria, they
can still perform the functions of these organelles by localizing certain metabolic enzymes on: a. the nuclear membranes. b. the endoplasmic reticulum. c. the plasma membrane. d. ribosomes. e. the cell wall.
The final three-dimensional shape of a single polypeptide is called its ________ structure.
A. primary B. secondary C. tertiary D. quaternary
The bacterium that causes tuberculosis can be expelled from the lungs by a cough and remain viable in the air for an hour or more. If a person inhales the bacteria from the air, what type of transmission has occurred?
A) indirect contact B) airborne C) waterborne D) foodborne E) bodily fluid
What is the most likely consequence of a mutation that causes sporopollenin to degrade quickly after it is synthesized?
A. a decrease in the number of sperm that can be produced B. a reduction in the ability of pollinators to detect and transfer pollen grains to a stigma C. a decrease in the ability of the pollen grain or spore to open when a suitable location is found D. a reduction in the ability of the integument of an ovule to develop into a seed coat E. a reduction in the ability of pollen and spores to disperse to new areas