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| 1 | |
Several pine trees with the same genotype are planted in a forest. At the end of five years, one tree is taller than the rest. Why might this be?
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| | A) | It can produce different proteins. |
| | B) | It has different DNA. |
| | C) | It has different genes. |
| | D) | Its environment is different. |
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| 2 | |
Which one of the following is a living factor in the environment that affects the species present?
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| | A) | predators |
| | B) | temperature |
| | C) | fire |
| | D) | floods |
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| 3 | |
When the last individual of a species dies, __________ occurs.
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| | A) | natural selection |
| | B) | selective breeding |
| | C) | mutation |
| | D) | extinction |
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| 4 | |
__________ is a change to DNA that forms new alleles.
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| | A) | Selective breeding |
| | B) | Evolution |
| | C) | A mutation |
| | D) | Natural selection |
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| 5 | |
Some plant species in the forests of Yellowstone National Park have seeds that can germinate only after __________.
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| | A) | an earthquake |
| | B) | a full moon |
| | C) | a fire |
| | D) | a flood |
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| 6 | |
According to the theory of natural selection, organisms that are better adapted to an environment __________ than organisms that are not.
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| | A) | survive and reproduce at a greater rate |
| | B) | run faster |
| | C) | grow larger |
| | D) | are stronger |
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| 7 | |
How long have people been observing the inheritance of traits?
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| | A) | for thousands of years |
| | B) | since 1951 |
| | C) | for the last 20 years |
| | D) | since the 1860s |
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| 8 | |
The science that studies how traits are passed from parents to offspring is called __________.
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| | A) | genetics |
| | B) | environmental science |
| | C) | natural selection |
| | D) | ecology |
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| 9 | |
__________ is the change in the genetics of a species over time.
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| | A) | Natural selection |
| | B) | Evolution |
| | C) | Heredity |
| | D) | Mutation |
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| 10 | |
What is the name of a model that can be used to predict the outcome of a genetic cross?
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| | A) | a Mendel square |
| | B) | a Concept map |
| | C) | a Punnett square |
| | D) | an Allele triangle |
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| 11 | |
Which one of the following could be described as one of your traits?
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| | A) | what type of movies you like |
| | B) | the color of your eyes |
| | C) | the color of your shirt |
| | D) | what state you live in |
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| 12 | |
Why would you expect the results of Mendel's experiments with garden peas to be close to the expected outcomes?
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| | A) | He read many books. |
| | B) | He used a calculator. |
| | C) | He studied large numbers of plants. |
| | D) | He was careful. |
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| 13 | |
When an organism has two different alleles for a trait, it is called __________.
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| | A) | a phenotype |
| | B) | a genotype |
| | C) | a hybrid |
| | D) | recessive |
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| 14 | |
Which one of the following is affected by internal environmental influences?
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| | A) | development of human brain cells |
| | B) | the thickness of tree leaves |
| | C) | flower color in hydrangea plants |
| | D) | the shape of an apple |
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| 15 | |
The many species of finches and tortoises Darwin observed on the Galapagos Islands are an example of __________.
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| | A) | phenotype variability |
| | B) | adaptive radiation |
| | C) | extinction |
| | D) | selective breeding |
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| 16 | |
A parent has the following combination of alleles: D and d, E and e, and F and f. Which one of the following combinations might be found in the parent's sex cells?
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| | A) | E, e, and F |
| | B) | D, e, and F |
| | C) | E, F, and f |
| | D) | D, F, and f |
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| 17 | |
Mendel's principle of __________ states that the alleles for one trait have no effect on the inheritance of alleles for a different trait.
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| | A) | segregation |
| | B) | independent assortment |
| | C) | dominance |
| | D) | recessive genes |
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| 18 | |
What environmental factors change as you travel up a mountain's slopes?
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| | A) | Temperature increases and wind decreases. |
| | B) | Temperature and wind increase. |
| | C) | Temperature decreases and wind increases. |
| | D) | Temperature and wind decrease. |
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| 19 | |
Some species of fish, including clown fish, are born with the ability to __________.
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| | A) | change sex |
| | B) | develop lungs |
| | C) | grow threadlike tails |
| | D) | change genotypes |
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| 20 | |
If the allele for a small tail in fish is recessive to the allele for a large tail, what genotype must a fish with the small tail phenotype have?
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| | A) | two small tail alleles |
| | B) | one small tail allele |
| | C) | two large tail alleles |
| | D) | one large tail and one small tail allele |
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