AP Biology Practice Test 2

Here is an additional AP Bio practice test to help you prepare for your multiple choice questions. The multiple choice section will account for 50% of your overall grade. No points are deducted for incorrect answers, so be sure to answer every question. Practice questions are a great way to prepare for your exam. Try our AP Bio practice test to see if you are prepared for your Exam.


AP Biology Multiple Choice Questions

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Question 1
The most important missing evidence in Darwin’s theory was:

A
Data that could show competition truly exists in populations.
B
Observations that variations are common in populations.
C
Evidence of overproduction in young.
D
The source of the genetic variation in populations.
E
Evidence that some forms of life became extinct.
Question 1 Explanation: 
Charles Darwin’s experiments, observations and theory of evolution were published before the work of Gregor Mendel. As a result, there was no hard evidence of how genetics played a role in inheritance. There was definitely no evidence of how genetics played a role in large populations of organisms. The only hint Darwin may have observed came from livestock breeding.
Question 2
The formation of a new species through geographic isolation of groups from the originating population is known as:

A
Allopatric speciation
B
Sympatric speciation
C
Adaptive speciation
D
Genetic drift
E
Nondisjunction
Question 2 Explanation: 
Allopatric speciation can occur when one species becomes isolated. Darwin observed this on the Galapagos Islands with finches. Finches that had different food from island to island developed beaks that would meet the type of food that was most available.
Question 3
Which of the following organisms below is considered a eukaryote?

A
Blue-green algae
B
Bacteria
C
Viruses
D
Archaea
E
An amoeba
Question 3 Explanation: 
An amoeba is a eukaryotic organism. Although an amoeba is simple, it does have simple parts that function like organs. For instance, it does have a contractile vacuole and can consume energy as a heterotroph.
Question 4
Why did Miller and Urey conduct their experiment about early Earth?

A
To prove organisms originated in the sea.
B
To test if biogenesis was real.
C
To show that underwater volcanoes were responsible for the creation of early Earth.
D
To test the abiotic origins of life.
E
To show that the elements of early Earth were not present early in life.
Question 4 Explanation: 
Miller and Urey created the conditions that were present during early Earth. They hoped to show that there were abiotic origins because the Earth possessed the elements and conditions that might have been responsible for the abiotic creation of life.
Question 5
What kingdom of life would you be most likely to find many examples of organisms that can undergo metamorphosis?

A
Plante
B
Eukarya
C
Animalia
D
Bacteria
E
Fungi
Question 5 Explanation: 
Insects and amphibians are most likely to undergo metamorphosis. Both of these organisms belong to the Animalia Kingdom.
Question 6
The loss of water through the stomata of leaves by evaporation is known as _____.

A
Transport
B
Transpiration
C
Anchorage
D
Capillary action
E
Adhesion
Question 6 Explanation: 
Transpiration is the loss of water that occurs when water evaporates out of the stomata of plants. This is one way that plants can regulate water build up. However, it can work against a plant on very hot days. Plants must open their stomata for gas exchange and when this occurs, transpiration happens.
Question 7
A circulatory system that has a heart that pumps fluid into a sinus and then the blood returns through reabsorption is known as a(n):

A
Anterior circulatory system
B
Systemic circulatory system
C
Closed circulatory system
D
Open circulatory system
E
None of these are correct
Question 7 Explanation: 
A closed circulatory system, found commonly in mollusks and arthropods is more simplistic than in more advanced organisms. This system lacks vessels that carry oxygenated and deoxygenated blood.
Question 8
A synapse is defined as a _____.

A
Unit of function of the nervous system
B
Support neuron
C
Receiver of signals
D
Junction between the axon of one neuron and the dendrite of the next neuron in a line
E
A sender of signals between two axons
Question 8 Explanation: 
Synapses are special places where a signal is transmitted. This signal takes place between the axon and dendrite of a neuron.
Question 9
The relationship between insulin and glucagon can best be described as _______.

A
Switch control feedback
B
Positive feedback
C
Negative feedback
D
Signal transduction
E
Ion gated transduction
Question 9 Explanation: 
The relationship between the hormones (insulin and glucagon) is a classic example of negative feedback inhibition. When sugar is high – insulin is produced. Once the sugar levels drop low, glucagon picks up production. The two hormones keep each other balanced in this way.
Question 10
What is the main function of red blood cells?

A
Contribute to the viscosity of the blood
B
Filter out toxins
C
pH buffering
D
Clotting
E
Transporting oxygen
Question 10 Explanation: 
The main function of red blood cells is to transport oxygen with the help of hemoglobin. The red blood cells coupled with hemoglobin pick up oxygen and carry throughout the body. They also pick up carbon dioxide and bring it back to the lungs to be exhaled.
Question 11
The location of lymphocyte production is the:

A
Blood vessels
B
Thymus
C
Bone marrow
D
Lymph nodes
E
Lymph vessels
Question 11 Explanation: 
The bone marrow is responsible for all lymphocyte production. The lymphocyte, or B cell starts as an immature cell in the bone marrow. It is a part of the humoral immunity.
Question 12
The first animal a newborn gorilla sees is a zoo keeper.  Afterward, the baby gorilla follows the zookeeper around instead of its mother.  This is an example of _______.

A
Reflex
B
Imprinting
C
Learning
D
Taxis
E
Kinesis
Question 12 Explanation: 
Imprinting occurs directly after birth. This is an example of filial imprinting which was described by Konrad Lorenz in his experiments with geese.
Question 13
Which letter represents the location of decomposers in the food web?

A
J
B
K
C
L
D
M
E
K and L
Question 13 Explanation: 
The decomposers feed off the dead and decaying organisms in the entire food web. Therefore all energy leads to them.
Question 14
The greenhouse effect occurs as which of these compounds increases in the atmosphere?

A
Nitrogen
B
Argon
C
Carbon dioxide
D
Nitrogen dioxide
E
Oxygen
Question 14 Explanation: 
The increased levels of carbon dioxide in the atmosphere are believed to cause an increase of ambient global temperatures.
Question 15
In the food pyramid shown below, which organisms are primary consumers?

A
Grasses
B
Mice
C
Bees
D
Snake
E
None of the above
Question 15 Explanation: 
Insects are feeding off of the primary producers. This means that they are the first or primary consumer in this food pyramid.
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