In what way are a human and a crab similar?
A. Both have muscles that pull against rigid skeletons.
B. Vertebrates and arthropods are deuterostomes.
C. Both have closed circulatory systems.
D. Both have a continuous growth pattern.
Answer: A
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Which of the following are organs of the immune system? (Check all that apply.)
_____ red bone marrow _____ spleen _____ thymus _____ thyroid _____ tonsils
An oxpecker bird eats ticks off of a cape buffalo. What benefit is it providing for the mutualistic relationship?
a. nutrients b. grooming c. protection d. reproductive aid e. living space improvements
The intercalating agent ________ allows researchers to visualize DNA and RNA on a gel when the gel is exposed to UV light
Fill in the blank(s) with correct word
Which of the below is a hallmark of cancer?
a. generate their own mitogenic signals b. resist exogenous growth-inhibitory signals c. evade apoptosis d. all the above are hallmarks of cancer