In the late 1960's, Robert Paine conducted landmark studies on diversity in the rocky intertidal zone, comparing the species diversity in control plots with diversity in experimental plots from which he removed the top predator, sea stars
After 5 years, 15 species of
intertidal invertebrates lived in the control plots, while the experimental plots were dominated
by only two species, one mussel and one barnacle. The process most likely responsible for
the loss of species diversity in the experimental plots was:
A. mutualism.
B. predation.
C. competitive exclusion.
D. parasitism.
E. resource partitioning.
C
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The first catalytic and self-replication biological molecule was most likely
A) RNA. B) DNA. C) proteins. D) ATP.
________ places sperm into a woman's reproductive tract to fertilize an oocyte.
A) Sperm washing B) Intrauterine insemination C) GIFT D) IVF
What are the regions where DNA-binding proteins can make direct contact with exposed nucleotides?
What will be an ideal response?
What is common to all of the oxidation reactions in the Citric acid cycle?
A. They are all decarboxylation reactions. B. They all lead to substrate-level phosphorylation of ADP to generate ATP. C. They all lead to the generation of NADH. D. They are all characterized by a loss of electrons from an organic molecule coupled to the reduction of an electron acceptor.