If this evolutionary tree is an accurate depiction of relatedness, then which of the following should be correct?

1. The entire tree is based on maximum parsimony.

2. If all species depicted here make up a taxon, this taxon is monophyletic.

3. The last common ancestor of species B and C occurred more recently than the last common ancestor of species D and E.

4. Species A is the direct ancestor of both species B and species C.

5. The species present at position 3 is ancestral to C, D, and E

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#Question id: 11484

#Unit 7. System Physiology – Animal

Two students studying physiology taste a known "bitter" substance, and both report sensing bitterness. They then sample another substance. Student A reports sensing both a bitter taste and a salty taste, but student B reports only a salty taste. What is the most logical explanation?

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#Question id: 11485

#Unit 7. System Physiology – Animal

In the odorant cells of mammals, specific odorants are detected by binding to _______

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#Question id: 11486

#Unit 7. System Physiology – Animal

The contraction of skeletal muscles is based on ________

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#Question id: 21240

#Unit 7. System Physiology – Animal

A visual exam in an 80-year-old man shows he has a reduced ability to see objects in the upper and lower quadrants of the left visual fields of both eyes but some vision remains in the central regions of the visual field. The diagnosis is

TLS Online TPP Program

#Question id: 21241

#Unit 7. System Physiology – Animal

A 45-year-old female who had never needed to wear glasses experienced difficulty reading a menu in a dimly-lit restaurant. She then recalled that as of late she needed to have the newspaper closer to her eyes in order to read it. A friend recommended she purchase reading glasses. Visual accommodation involves

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#Question id: 21242

#Unit 7. System Physiology – Animal

A 28-year-old male with severe myopia made an appointment to see his ophthalmologist when he began to notice flashing lights and floaters in his visual fi eld. He was diagnosed with a retinal detachment. The retina