Toth - 8th Gr. Final Exam Review - Semester 2

Which of the following is an example of genetic engineering?

A farmer takes pollen from a plant with desired traits and intentionally places the pollen on a plant with other

Odors that repel, spines, poisonous chemicals, and thorns are all considered __________.

Adaptations that enhance survival

Certain antibiotics are no longer effective against the bacteria that they used to kill. How might this be explained?

Bacteria that were resistant to the antibiotic survived to reproduce.

Which of the following is an accurate statement about the appearance of parents and children?

Children get some of the features from one parent and some from the other.

Coyotes are beginning to move back into areas where humans live. They have learned to feed off of human garbage and small pets. This is an example of _________.

adaptation

Over time, an organism's behavior evolves to fit its environment. This process is called:

adaptation.

Which of the following is an example of a trait inherited from parents?

attached earlobes

In a developing embryo, which parts of the body are most easily damaged if the mother drinks alcohol during pregnancy?

brain

The snowshoe hare has the ability to change its coat color. It is brown during the spring, summer, and early fall but changes to white as winter approaches. What adaptation does the snowshoe hare have that allows it to hide from predators?

camouflage

On what cell structures are genes found?

chromosomes

How could selective breeding be used to reduce deforestation?

creating trees with more leaves

What is the name given to a specific region of DNA that codes for a particular hereditary trait?

gene

Chromosomes contain segments of DNA that code for specific traits. What are these segments called?

genes

Which of the following is most likely, over time, to give rise to a totally new species?

geographic isolation

What is one problem that can develop as a result of poor diet and lack of exercise?

heart disease

What is one way obesity can affect human health?

heart disease

A single chromosome is composed of:

hundreds to thousands of genes.

Where are most of the genes found in a eukaryotic cell?

in the nucleolus

A health organization put out an advertising campaign stating that smoking causes a lung disease called emphysema. This statement is true because

more smokers get emphysema than nonsmokers.

Which of the following is most likely to be different in identical twins?

none of the above

As human beings continue to change Earth's environment, which animal species will be most likely survive?

those species that will best be able to adapt to the changes