The ornithischian dinosaurs:a
were carnivorous.
b. had pelvic bones similar to birds.
c. died out during the Jurassic period.
d. were the ancestors of the crocodiles and snakes of today.
e. were usually small dinosaurs
B
Biology & Microbiology
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One nucleotide contains one
A. pentose sugar. B. phosphate. C. nitrogen base. D. All of the choices are correct.
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Species of Streptococcus and Staphylococcus produce_____, substances that are toxic to white blood cells, including phagocytes
Fill in the blank(s) with the appropriate word(s).
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IgG antibodies kill pathogens both directly and indirectly
Indicate whether the statement is true or false
Biology & Microbiology