Which of the following is a difference between electronegative and electropositive atoms?
A. Electronegative atoms tend to lose electrons.
B. Electropositive atoms tend to gain electrons.
C. Because oxygen (O) is strongly electropositive it will have a partial positive charge in H2O.
D. Because hydrogen (H) is strongly electronegative it will have a partial negative charge in H2O.
E. As atomic radii decrease, atoms tend to become more electronegative.
E
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You have a sample of cat emesis (vomit) and find worms in the sample. The cylindrical worms are
long and slender, pointed at each end, with no other distinguishing characteristics. They are members of the phylum:A. Platyhelminthes. B. Nematoda. C. Cnidaria. D. Annelida. E. Nemertea.
What is typical osmolarity of body fluids in most marine invertebrates?
a. about 1500 mOsm/L b. about 1000 mOsm/L c. about 225 mOsm/L d. about 5 mOsm/L
What is the purpose of glycolysis?
A) It produces oxygen. B) It breaks down glucose into pyruvate, releasing energy. C) It uses ATP to make glucose. D) It breaks down pyruvate to release energy.
Archaea are considered the evolutionary precursors to eukaryotic cells.
Answer the following statement true (T) or false (F)