Which mature tissue has nutrient canals?
a. skin
b. bone
c. cartilage
d. epithelial
e. muscle
Answer: b
You might also like to view...
Organisms capable of producing their own food are known as
(a) autotrophs. (b) heterotrophs. (c) omnivores. (d) Herbivores.
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.
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.
Our species emerged approximately:
A. 4 mya B. 2 mya C. 1 mya D. 150 kya E. 10 kya