Living organisms must gather energy and materials from their surroundings to ____
a. build new biochemicals
b. grow
c. maintain and repair their parts
d. produce offspring
e. all of these
E
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Blood is a type of connective tissue because blood _____
A) has multiple cell types B) has an extensive extracellular matrix C) functions in transportation D) can be both liquid and solid
As structural diversity within plant communities increases, the number of animal species ________
Fill in the blank(s) with correct word
Odor molecules diffuse through mucus and bind directly to the ________ of olfactory receptors
A) corpuscles B) dendrites C) axons D) microvilli E) cell body
What source of genetic variation arises from a change in the DNA sequence of sex cells?
a. Mutation b. Genetic recombination c. Genetic diversity d. Natural selection