There are two kinds of behavior that all organisms are capable of doing. If Inez blinks her eyes because a gnat flies close to them, this is considered a(n) ________ behavior; but, if she then swats at the gnat, this is considered a(n) ________ behavior.
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The Tasmanian tiger (now extinct) and the American grey wolf…
The Tasmanian tiger (now extinct) and the American grey wolf evolved independently of each other, but show similar physical structures and hunting behaviors. The similarity between the two organisms is most likely a result of:
Biologists recently discovered that black wolves got their c…
Biologists recently discovered that black wolves got their coat color from exchanging genes with dogs. This is an example of
If you were flying east on a jet across three times zones an…
If you were flying east on a jet across three times zones and your watch read 12:00 noon when you landed, you should
The rule “like dissolves like” explains why liquids are gene…
The rule “like dissolves like” explains why liquids are generally soluble in other liquids and gases are soluble in one another.
A protostar is an accumulation of gases in outer space that…
A protostar is an accumulation of gases in outer space that will become a star.
An alpha particle is really a high-energy electron ejected f…
An alpha particle is really a high-energy electron ejected from the nucleus.
Hot, molten rock, welling up from the earth’s interior, spre…
Hot, molten rock, welling up from the earth’s interior, spreads the ocean floor, causing the continents to drift apart.
According to plate tectonics, new crustal material is create…
According to plate tectonics, new crustal material is created at
Water solutions of ionic substances that conduct electricity…
Water solutions of ionic substances that conduct electricity are called