Humans are part of which of the following domains?
What will be an ideal response?
Eukarya
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The chemical linkages that exert an attractive force over the greatest distance are ____
a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds
Bacteriophages can be used as vectors in recombinant DNA experiments because they
A) are small and made of double-stranded DNA. B) are circular and easily imported into bacteria or yeast. C) insert their genetic material into bacteria. D) are resistant to protective restriction systems.
Which hormone is responsible for increasing blood calcium levels?
a. insulin b. glucagon c. parathyroid hormone d. calcitonin
One plasma cell will secrete antibodies of various classes, but the antibodies will all have the same specificity.
Answer the following statement true (T) or false (F)