The balance between photosynthesis and ___________ is altered by the combustion of fossil fuels.
A. respiration
B. sunlight
C. growth
D. decomposition
A. respiration
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Gene technology has made it possible for bacteria to express human genes. Why is this possible?
How many hydrogen bonds can a water molecule form?
A. 1 B. 2 C. 3 D. 4 E. 5
The primary function of centrioles in animal cells is ____
a. generation of flagella and cilia b. spindle formation c. to connect the two sister chromatids d. to provide a point of attachment for spindle fibers on chromosomes e. cell plate formation
Which of the following statements is not true concerning the central nervous system?
A. The central nervous system is made up of the spinal cord and the brain. B. Both the brain and spinal cord are protected by meninges. C. The spaces around the brain and spinal cord are filled with fluid. D. The brain and spinal cord contain only white matter: myelinated axons that run together in bundles. E. Both the brain and spinal cord are protected by bone.