Primitive reptiles first appeared during the _____ period.
A. Carboniferous
B. Cambrian
C. Devonian
D. Ordovician
E. Silurian
A. Carboniferous
Biology & Microbiology
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Animals living in the supralittoral fringe must be able to deal with the force of wave shock
Indicate whether the statement is true or false
Biology & Microbiology
Recognition or "self" proteins on the surface of your cells are called ____
a. T cell receptors (TCRs) b. cytokines c. major histocompatibility complex (MHC) markers d. complements e. PAMPs
Biology & Microbiology
The simplest multicellular animals that have only a few different cell types are
A) flatworms. B) sea squirts. C) jellyfish. D) anemones. E) sponges.
Biology & Microbiology
Do all organisms fit equally well under the biological species concept? Explain.
What will be an ideal response?
Biology & Microbiology