A group of cells having similar structure and function is called a(n) _____
A. organ system.
B. tissue.
C. population.
D. organ.
E. organism.
B. tissue.
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A) A B) B C) C D) D E) E
Which factor currently tends to regulate abundance of commercially valuable estuary species such as oysters and crabs?
a. Competition b. Predation c. Human activities d. Normal seasonal die off e. Disease
When the concentration of glucose in the blood rises following the digestion of a meal, what is the hormonal response?
A) Increased amounts of both glucagon and insulin are released. B) An increased amount of glucagon is released. C) An increased amount of insulin is released. D) Glucagon and insulin levels in the blood stay the same.
Entry into mitosis occurs because
a. cyclin is destroyed at the beginning of mitosis. b. cyclin is phosphorylated at the beginning of mitosis. c. sufficient cyclin-dependent kinase is synthesized to trigger mitosis. d. Cdk1/Cyclin B (MPF) get activated.