Ecology/Physics Unit II Retest
- 1. Which of the following is an effect of drought that could lead to the extinction of a species of grazing animals?
A) Increased predator populations
B) Increased volcanic activity
C) Reduced prey populations
D) Decreased plant growth
- 2. Fossils of tropical plants and animals can be found buried in limestone rock in the North Texas area. These plants and animals are no longer found in this region. What is the most likely cause of the disappearance of these tropical plants and animals?
A) The climate in that area is different today than when tropical plants and animals lived there.
B) Earthquakes and volcanoes destroyed all the tropical plants and animals.
C) Air pollution and acid rain killed off all the tropical plants and animals.
D) Tropical animals ate all the tropical plants and everything died out.
- 3. A species of fish found in a coral reef exhibits variation in color. Lighter colored fish tend to blend in with their environment, whereas darker colored fish tend to stand out. Which of the following best describes how natural selection will affect this species of fish?
A) Only the darker variety of fish will survive.
B) Both the lighter and the darkr fish will survive.
C) Only the lighter variety of fish will survive
D) Neither the lighter or darker varieties of fish will survive.
- 4. About 70 years ago, cane toads were introduced to Australia. The toads are toxic to some species of snakes, such as Dendrelaphis punctulatus. The longer an individual snake is, the greater its chance of survival after eating a cane toad.Which of the following did scientists most likely observe in the D. punctulatus snake population as a result of the presence of the cane toads?
A) The average body length in the population increased
B) The entire population became resistant to the toads.
C) The average body length in the population decreased.
D) The entire population was killed by the toads.
- 5. The example of the peppered moths living near English industrial cities demonstrates that:
A) The environment near these cities has always favored dark colored moths
B) A change in an environment can result in the evolution of species living there
C) Evolution occurs so slowly that it is not possible to determine that it has happened in less than a million years
D) Natural Selection does not occur in cities
- 6. How are speed and velocity different?
A) a change of position
B) a change of distance
C) a change of acceleration
D) a change of direction
- 7. A teddy bear, with a mass of 3 kg, was kicked and has an acceleration of 10 m/s/s. What is the force?
A) 30 Newtons
B) 300 Newtons
C) 3.0 Newtons
D) 0.30 Newtons
- 8. Meyton Panning throws a football, with a mass 0.5 kg, it accelerates at a rate of 150 m/s/s. What is the force?
A) 750 Newtons
B) 7.5 Newtons
C) 300 Newtons
D) 75 Newtons
- 9. Sally was running to catch a boy and threw her purse to get his attention with a force of 6N. It has a mass of 2 kg, what was it's acceleration?
A) 0.33 m/s
B) 12 m/s
C) 30 m/s
D) 3 m/s
- 10. The graph shows the motion of a person riding a bicycle. What is the average speed of the bicycle between 2 seconds and 12 seconds?
A) 3.0 m/s
B) 2.0 m/s
C) 4.0 m/s
D) 0 m/s
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