Explain the two opposing hypotheses that currently exist about the origin of modern humans. What will be an ideal response?
Concepts to Consider: The "out of Africa" hypothesis suggests that modern Homo sapiens evolved in
Africa, then spread to Europe and Asia; the "multi-regional" hypothesis proposes that Homo sapiens
evolved from diverse groups of Homo erectus in Africa, Asia, and Europe.
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What is the immediate effect of ligand binding to a ligand-gated channel?
A. the flow of ions into or out of the cell B. a conformational change of the channel C. the activation of kinase proteins D. the formation of cyclic AMP
Explain why fungal life cycles are not considered an example of "alternation of generations."
What will be an ideal response?
Stem cells in red bone marrow give rise to ________ and ________ blood cells
Fill in the blank(s) with correct word
What type of vaccine is the hepatitis B vaccine?
A. inactivated whole pathogen B. attenuated vaccine C. toxoid vaccine D. a recombinant vaccine composed of a single antigen of the hepatitis virus E. a vaccine produced by treating the virus with formaldehyde