Life Science Ultimate Review

What is another name for natural selection?

• survival of the smartest

• survival of the fastest

• survival of the biggest

• survival of the fittest

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Darwin wrote that organisms with traits that are best suited to the environment will ________________

• increase in number

• become extinct

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A grizzly bear survives because he is well-adapted to his environment. When he reproduces he passes on those traits to his offspring. this process is called

• Natural Selection

• Selective Breeding

• Random mutations

• Variations in a species

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 Which of the following best illustrates natural selection?

• A. A community whose members work together utilizing all existing resources and migratory routes.
• B. An organism with favorable genetics variations will tend to survive and breed successfully.
• C. A population monopolizes all of the resources in its habitat, forcing other species to migrate.
• D. The largest organisms in a species receive the only breeding opportunities

Plants in areas with short growing seasons often have more chloroplasts in their cells than plants in areas with long growing seasons. Which of the following best describes a difference between the two types of plants?

• A. Plants in areas with short growing seasons have a lower rate of cellular respiration.
• B. Plants in areas with short growing seasons metabolize proteins more quickly.
• C. Plants in areas with short growing seasons grow taller.
• D. Plants in areas with short growing seasons make food more quickly.

the genetic code for the gene

• phenotype
• genotype
• homozygous

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when you have two different genes

• heterozygous
• dominant
• homozygous

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the physical look of a trait

• phenotype
• genotype
• recessive

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G = green, g = yellow
The genotype for a yellow plant is...

• GG
• Gg
• gg
• all of the choices result in yellow

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Which of the following alleles is homozygous (purebred) recessive?

• Tt
• tt
• TT
• t

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