_____ is the process in which two groups of organisms speciate in response to each other and at the same time
A. allopatric speciation
B. peripatric speciation
C. adaptive radiation
D. co-speciation
E. sympatric speciation
D
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The proteins of the electron transport chain active in the light-dependent reactions _____
A) are membrane proteins present in the thylakoid B) are free proteins present in the thylakoid lumen C) are considered to be part of the reaction center of photosystem I D) absorb the same wavelengths of light as their associated chlorophylls
The genetic code is made up of codons consisting of
how many nucleotides? a. 2 b. 3 c. 5 d. 6 e. 9
Which is a part of the body's nonspecific defense mechanism?
A) skin B) T cells C) B cells D) antibodies
Increased heart rate associated with running is an example of a ____________ process.
A. metabolic B. generative C. responsive D. control