AP Bio Speciation & Cladograms

A horse and a donkey can successfully mate to produce offspring known as a mule.  Mules are sterile .  Would mules be classified as a species?

• Yes, mules have enough of their own traits to be considered a species.
• Yes, the fact that have different number of chromosomes makes them a different species
• No, mules are too similar to the parent species
• No, due to their inability to reproduce successfully.

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NGSS.HS-LS4-5

A newly identified organism has four limbs and amniotic eggs with shells.  Which organism do they most likely share a common ancestor with?

• ray-finned fish
• birds
• rodents
• amphibians

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NGSS.MS-LS4-2

Using the cladogram:  a common ancestor of amphibians and ray-finned fish would have

• a bony skeleton
• four limbs
• scaly skin
• eggs with shells

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NGSS.HS-LS4-1

The wing of a bat and a humans' arm have different functions and appear very different.  Yet, the underlying anatomy is basically the same.  therefore, these structures are examples of

• geographic isolation
• analogous structures
• homology
• reproductive isolation

A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed. Which of these explanations best explains what happened?

• The herbicide company lost its triazine formula and started selling poor-quality triazine.
• Natural selection caused the pigweed to mutate, creating a new triazine-resistant species.
• Triazine-resistant pigweed has less-efficient photosynthesis metabolism.
• Triazine-resistant weeds were more likely to survive and reproduce.

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NGSS.HS-LS4-2

NGSS.HS-LS4-4

NGSS.HS-LS4-5

Which statement represents the best explanation for the observation that the nuclear DNA of wolves and domestic dogs has a very high degree of sequence homology?
Dogs and wolves...

• have very similar morphologies.
• belong to the same order.
• are both members of the order Carnivora.
• share a very recent common ancestor.

Tags

NGSS.HS-LS4-1

A common ancestor for both A and E could be at position __.

• 1

• 2

• 3

• 4

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NGSS.HS-LS4-1

NGSS.HS-LS4-2

On the cladogram, which number represents the common ancestor of organisms B & D?

• 1
• 2
• 3
• A

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NGSS.HS-LS4-1

A table of arachnid and insect characteristics is shown. Which characteristic could be used to distinguish between
arachnids and insects?

• Jointed legs
• Body segments
• Presence of eyes
• Presence of antennae

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NGSS.MS-LS4-2

You look at two species and see very similar amino acid sequences. What does this likely tell you?

• These are the same animal.
• These animals have a common ancestor.
• These animals are not likely related.
• These animals are likely becoming one species.

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NGSS.HS-LS4-1