Chemical defenses are found in all of the following except
A. Batesian mimics.
B. plants.
C. insects.
D. snakes, spiders, and fishes.
E. marine animals.
Answer: A
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Arrange the steps of antibody-mediated immunity in the proper order
1. Plasma cells secrete antibodies. 2. Helper T cells interact with B cells displaying the same antigen-MHC complex. 3. Contact with antigen. 4. Clones of B cells produced. 5. Fragmentation of antigen.
a. 3, 2, 5, 1, 4 b. 3, 5, 2, 4, 1 c. 1, 3, 5, 2, 4 d. 4, 3, 2, 1, 5 e. 5, 3, 4, 2, 1
What type of enzyme regulation is illustrated here?
a. allosteric inhibition
b. allosteric activation
c. feedback inhibition
d. dehydration inhibition
If the sequence ATGCATGTCAATTGA were mutated such that a base were inserted after the first G and the third T were deleted, how many amino acids would be changed in the mutant protein? View Available Hint(s) If the sequence ATGCATGTCAATTGA were mutated such that a base were inserted after the first G and the third T were deleted, how many amino acids would be changed in the mutant protein?
a. Two. b. Three. c. One. d. None.
The facilitation model of succession involves strong competitive interactions among colonizing species
Indicate whether the statement is true or false