Pre-Test Unit #4

Organisms are considered a _______ if they can survive and produce fertile offspring.

Part of Darwin's theory of evolution by natural selection included three specific events. He believed that in an effort to survive organisms would use ​ (a)   to have more offspring to encourage species survival. Also, ​ (b)   in a species could result through mutation and as a result of ​ (c)   . Last, ​ (d)   would occur as traits that made an organism more suited to its environment would become part of that species' genetic makeup.

• overproduction
• variation
• sexual reproduction
• selection

UNIT 4. ​ (a)   is widely known for his theory of evolution. One of his best known examples of change over time comes from the Galapagos ​ (b)   . He used this organism and many others to explain how through ​ (c)   the fittest organism is under pressure to ​ (d)   .

• Charles Darwin
• finch
• natural selection
• survive

Fossils are commonly found in ​ (a)   in sedimentary rock. The ​ (b)   contain the older fossils; however, the layers toward to the ​ (c)   are more recent. Fossils are used as one piece of evidence that supports the theory of ​ (d)   .

• layers
• lower layers
• top
• evolution

Multiple Correct. Deer are brown/tan to make them less likely to become prey. This is an example of an animal adaptation. Which of the following is an example of a plant adaptations?

• None of these are correct plant adaptations.

• Cacti have thorns to prevent them from being eaten.

• Tropical rain forest trees have thick, wide roots to anchor them into the soil.

• Acacia trees in the savannah have leaves near the top of the branches to prevent them from being eaten.

Polar bears are white to make them more lethal predators. This is an example of an animal adaptation. Which of the following is an example of a plant adaptations?

• Milkweed has large, flat leaves and provides shelter for many animals.

• Milkweed leaves produce a sap that is hard for most organisms to digest.

• Some types of milkweed grow in fields, and other types grow in wet areas.

• Milkweed is the primary food for monarch butterfly caterpillars and other organisms.

Part of the theory of evolution by natural selection includes three specific events. First, organisms use ​ (a)   to have large numbers of offspring to encourage species survival. Also, ​ (b)   in a species could result through mutation and as a result of ​ (c)   . Last, ​ (d)   would occur as traits that made an organism more suited to its environment would become part of that species' genetic makeup.

• overproduction
• variation
• sexual reproduction
• selection

In ​ (a)   selection, man attempts to change organisms ​ (b)   using selective breeding techniques. However, in ​ (c)   selection organisms that ​ (d)   long enough to ​ (e)   do so because, in theory, they possess traits that make the better suited.

• artificial
• rapidly
• natural
• survive
• reproduce

Any change in an organism that allows it to survive and reproduce is called a(n) ​ (a)   . An example can be seen in this picture of an organism called the hawk moth; it is display what is called ​ (b)   . Another adaptation that helps organisms to survive is called ​​ (c)   where they blend into their environment.

• adaptation
• mimicry
• camouflage