The most common type of lever system in the body has the force applied ____

a. at the free end of the bone
b. at the attached end of the bone
c. at the fulcrum
d. between the fulcrum and the load
e. at the load end


ANSWER: d

Biology & Microbiology

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You are walking along the beach and see the remains of an unknown animal washed up on shore. You examine its characteristics and see that it is gelatinous, transparent, bilaterally symmetric, and lacks tentacles. You provisionally identify its phylum according to which choice?

a. Gelatinous body rules out Cnidaria. b. Lack of tentacles rules out Cnidaria. c. Bilateral symmetry rules out Platyhelminthes. d. Transparent body rules out Ctenophora.

Biology & Microbiology

Vaporization that occurs only at the surface of a liquid

What will be an ideal response?

Biology & Microbiology

Physical deterrents on plants discourage the interspecific interaction called ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

The relatively large number of new mutations that occur in the human genome each generation is tolerable because:

A. we have excellent DNA repair mechanisms. B. most of the mutations occur in somatic cells, not germ cells. C. most of our genome is non-coding DNA, so few mutations affect our proteins. D. we have excellent protein repair mechanisms. E. compared to other organisms, changes in our proteins have relatively little affect on our cells' structure and function.

Biology & Microbiology