All of the following are tenets of the cell theory that
research with modern microscopes supports
EXCEPT that
a. all organisms consist of one or more cells.
b. the cell is the smallest unit that retains the
characteristics of life.
c. since the first cell, each new cell is descended
from previous cells.
d. each cell is composed of products that it
manufactures.
e. cells may arise spontaneously under certain
laboratory conditions.
Answer: e
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The total solute concentration of a solution of water and other substances (salts, proteins, etc.) is referred to specifically as its
A. osmolarity. B. tonicity. C. salinity. D. specific gravity. E. density.
Two boys are on a camping trip and need birch bark to start their cooking fire. They cleanly remove a six-inch strip of bark from around the entire circumference of the trunk. Explain what eventually will happen to this tree
What will be an ideal response?
Objective evidence of disease as noted by an observer is called
A) a sign. B) a symptom. C) a syndrome. D) prodromal.
Even if philosophers accept and study the importance of change, a full theory of evolution by natural selection cannot exist without:
a. understanding the sorts of changes that have taken place. b. recognizing the significance of testing one's hypotheses. c. realizing that some species go extinct over time. d. realizing the vast expanses of time over which some changes take place. e. B and C.