What is the function of the buds formed by hydra?
A. They aid in digestion.
B. They are a form of asexual reproduction.
C. They develop into cnidocytes and can be used in defense.
D. They develop into the nerve net and are used to detect prey.
E. They produce new epidermal tissue to replace the old tissue.
Answer: B
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Recommended guidelines for laboratory microbiological precautions should reflect the laboratory's ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following streptococci is associated with dental caries?
A) viridans streptococci B) Streptococcus pyogenes C) Streptococcus pneumoniae D) Streptococcus equisimilis E) Streptococcus arginosus
Reduction of nitrogen-oxygen ions and compounds by some bacteria is called ________.
A. aerobic respiration B. denitrification C. deamination D. nitrification E. fermentation
The difference between normal and sickle-cell
hemoglobin is based upon
a. the number of amino acids in the molecule. b. the substitution of one amino acid for another. c. the number and orientation of the amino acid chain attached to the heme portion of the molecule. d. the number of oxygen molecules that can be carried. e. the types of bone marrow that produce it.