A creature that does NOT have an endoskeleton is the
A. starfish.
B. shark.
C. crocodile.
D. beetle.
E. sea sponge.
D. beetle.
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Antigens in vaccines are mixed with an adjuvant to enhance the rate and degree of immunization.
Answer the following statement true (T) or false (F)
What function does a clitellum serve?
a. anchoring an animal to its substrate b. digestion c. cushions organs d. glues two organisms together for sperm exchange e. keeps blood from clotting
For plants, the total amount of carbon gained by photosynthesis must be greater than that respired over their lifetime because...
What will be an ideal response?
Which of the following statements regarding mitosis and meiosis is false?
A) Mitosis provides for growth and tissue repair. B) Meiosis provides for asexual reproduction. C) In mitosis, the chromosomes replicate only once in the preceding interphase. D) All the events unique to meiosis occur during meiosis I.