Which genus or genera of hominin is/are most consistently associated with stone tools?
A) Homo
B) Paranthropus
C) Australopithecus
D) Sahelanthropus
E) All of the above.
A
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What is replication in scientific inquiry?
A. Asking several different hypotheses at once. B. Testing both biotic and abiotic factors. C. Finding different species for experiments. D. Performing experiments several times. E. Having a well defined time frame for experiments.
The processor of phosphorylating amino acid residues on both sides of the cytoplasmic tail of a receptor for tyrosine kinase is known as ___ .
a. transphosphorylation b. phosphorylation c. cleavage d. none of the above
Van Leeuwenhoek's microscope magnified up to 300x. This was a(n)
a. Electron microscope. b. Phase-contrast microscope. c. Simple microscope. d. Confocal microscope. e. Compound microscope.
What is the best explanation of why we have identified only a small fraction of fungi species?
A) Most fungi species grow underground and in inaccessible places. B) Fungi species lack chlorophyll and are transparent. C) Most fungi species are unicellular and microscopic. D) Fungi species have extremely short life spans and are seldom found alive.