Bio St

Similarities are found between embryos of fish, dogs, and humans. What does this observation suggest?

• They all have similar components in their blood.

• They all maintain similar number of chromosomes.

• They have similar habitat requirements.

• They share a common genetic heritage

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Two different species contain a nucleotide sequence that is almost identical. What does this evidence suggest?

• The two different species have the same DNA.

• The two species may be evolving into the same species.

• The two species have the same number of chromosomes.

• The two species may have a common ancestor.

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NGSS.HS-LS4-1

Scientists believe that an asteroid hit the Earth causing dramatic weather changes leading to the extinction of dinosaurs. New species of animals evolved from this event.

Which concept best explains this?

• geographic isolation

• gradualism

• mutualism

• punctuated equilibrium

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Lamarck proposed that part of an organism's body that is in continuous use becomes stronger, while that which is not in use deteriorates. The organism passes these modification on to the next generation. We now know this is not true.

Which problem was Lamarck's work trying to explain?

• Which organisms resemble each other?

• Why did life originate on earth?

• How do organisms evolve?

• Why do organisms reproduce?

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Which method provides the most accurate evidence for scientists to use when determining evolutionary relationships between two species of animals?

• comparing genetic sequences in the animals using samples of DNA

• identifying fossil patterns in rock strata where the animals live

• looking for similar vestigial structures in both species of animals

• looking for similarities in the coloration and eating habits of the animals

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