Chapter 2
The atomic mass of an element
is determined by the number of protons and neutrons it contains
In an experiment, the manipulated factor is the
independent/experimental variable
What is NOT required for Fixed Action Patterns?
Learning
Interaction between two species in which one feeds on the other is
predation
Photosynthesis is a part of the _______
Carbon Cycle
If a neutral element has an atomic number of 12, then it has _______ electrons
12
T/F: A control group is always exposed to the factor being tested
False
Learned behavior that causes baby ducks to follow their mother is called
imprinting
A form of symbiosis in which one benefits and the other is unaffected is
commensalism
Energy flow in an ecosystem is NOT cyclic because energy is
no longer useful once converted to heat
Which type of bond formation is responsible for the properties of water?
hydrogen bond
When researchers test a new human cancer drug using mice, the mice constitute the
model
To train an animal, rewarding each desired behavior step (like pigeons playing ping-pong) is
operant conditioning
Food, shelter, and disease are all examples of
density dependent factors
Inverted ecological pyramids can occur in what habitat?
ocean shorelines with algae
Glycogen is a _________
polysaccharide; used to store glucose/energy
What is one way to control for confounding variables?
A. using many replicates
B. using a double-blind study
C. randomly assigning test subjects
Male elk battling with antlers for females is an example of
sexual selection
A sudden freeze kills ¾ of a butterfly population. This is due to
density-independent factor
What are the two main biologically usable forms of nitrogen (formed during nitrogen fixation)
ammonium (NH₄⁺) and nitrates (NO₃⁻)
The functional group –PO₄ is a/an
D. phosphate group
Plant seedlings bend toward a window. This bending is an example of
response to stimulus
A nephew has a genetic relatedness of __________ to an uncle
¼
The demographic transition in developed countries is due to
decreased death rate followed by decreased birthrate
In biogeochemical cycles, ________ holds an element or water for a very long time, while an _________ holds it for a relatively short period
reservoir; exchange pool