Which of the following is not a defining trait of the phylum Chordata?
A. notochord
B. dorsal hollow nerve cord
C. pharyngeal slits
D. post anal tail
E. protostome development
E. protostome development
Biology & Microbiology
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Comparative genome studies show that humans and _____________________ shared a common ancestor approximately 5.4 to 6.3 million years ago
Fill in the blank(s) with correct word
Biology & Microbiology
Microorganisms are involved in
A. causing disease. B. curing/treating disease. C. preparing food. D. cleaning up pollutants. E. All of the choices are correct.
Biology & Microbiology
A marine fish with a cold body temperature that matches its cold surroundings is an example of rev
A. negative feedback. B. regulating. C. conforming. D. conditioning.
Biology & Microbiology
Helper T cells activate both B cells and cytotoxic T cells.
Answer the following statement true (T) or false (F)
Biology & Microbiology