Humans are chordates. Which animal group is most closely related to chordates?
A) molluscs
B) echinoderms
C) annelids
D) arthropods
B
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The complement pathway that requires antibodies to be activated is the
A. alternate pathway. B. classical pathway. C. properdin pathway. D. inflammatory pathway.
Which molecule catalyzes covalent bond formation between fragments of DNA.
A. helicase. B. ligase. C. polymerase. D. primase. E. nuclease.
Diluted acetic acid, CH3COOH, is commonly called vinegar. How many atoms of hydrogen are present in one
molecule of acetic acid?
a. one b. two c. three d. four e. five
Given the information that type O is the universal donor blood type and type AB is the universal acceptor, which of the following is not true?
a. Type A can donate to type A and AB and can receive from type A and type O. b. Type B can donate to type B and AB and can receive from type B and type O. c. Type AB can donate to AB, A, and B and can receive from type A, B, AB, and O. d. Type O can donate to A, B, AB, and O and can receive from type O. e. All of the above are true.