White blood cells use __________ to get rid of
foreign particles in the blood.
a. simple diffusion
b. bulk flow
c. osmosis
d. phagocytosis
e. facilitated diffusion
Answer: d
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Movement in a specific direction in response to a stimulus is called a ____
Fill in the blank with the appropriate word.
As a chemical element moves through a biogeochemical cycle, it moves between "bio" and "geo". The "bio" in biogeochemical refers to biotic reservoirs, or __________
Fill in the blank(s) with the appropriate word(s).
In eukaryotic cells, chromosomes are composed of both DNA and proteins
Indicate whether the statement is true or false
In 1938, scientists found a population of coelacanths in the Indian Ocean. This fish species is considered a "living fossil" and appears not to have changed morphologically for 80 million years. This discovery supports the ________ model of evolution.
A. punctuated equilibrium B. common descent C. gradualism D. natural selection E. adaptation