Which mature tissue has nutrient canals?

a. skin
b. bone
c. cartilage
d. epithelial
e. muscle


Answer: b

Biology & Microbiology

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Organisms capable of producing their own food are known as

(a) autotrophs. (b) heterotrophs. (c) omnivores. (d) Herbivores.

Biology & Microbiology

The skeleton of vertebrates serves several important functions. Among these are

_____ support and locomotion. _____ blood formation. _____ conduction of nerve signals. _____ protection of organs and soft tissues. _____ calcium homeostasis.

Biology & Microbiology

What is the primary reason internal homeostasis must be maintained?

A) Most organisms have not evolved mechanisms to control positive feedback systems. B) Enzymes must retain their correct three-dimensional structure. C) Homeostasis prevents the wasting of stockpiles of coenzymes. D) Unregulated variations cause the cells' DNA to mutate. E) Wide swings in the internal environment interfere with normal metabolic reactions.

Biology & Microbiology

Our species emerged approximately:

A. 4 mya B. 2 mya C. 1 mya D. 150 kya E. 10 kya

Biology & Microbiology