The central nervous system of vertebrate animals consists of
A. the brain.
B. the spinal cord.
C. all nerves in the body.
D. nerves originating at sensory receptors.
E. the brain and spinal cord.
E. the brain and spinal cord.
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The water vascular system is not involved with: a. gas exchange
b. excretion. c. locomotion. d. sensing of light.
If an anticodon was AUG, what would the
corresponding nucleotides on DNA be?
a. TAC b. ATG c. UAC d. AUG e. CGT
Chemokines are adhesion molecules found on surfaces of leucocytes and play a crucial role in the recruitment of leukocytes to the sites of inflammation .
a. true b. false
Declining amphibian populations are correlated with four of the following. Which one is the exception?
A. Habitat loss B. Introduction of non-native species C. Long-term changes in climate D. Evolutionary changes in amphibians E. Fungal infections and parasitic diseases