The observation that tusks were limited to males in several species, and were apparently not used in food-gathering, is evidence that the tusks probably

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#Question id: 5003

#Unit 11. Evolution and Behavior

Fruit fly eyes are of the compound type, structurally very different from the camera-type eyes of mammals. Even the camera-type eyes of mollusks, such as octopi, are structurally quite different from those of mammals. Yet, fruit flies, octopi, and mammals possess very similar versions of Pax-6. The fact that the same gene helps produce very different types of eyes is most likely due to

TLS Online TPP Program

#Question id: 1246

#Unit 4. Cell Communication and Cell Signaling

An SH2-containing protein contains a mutation that changes its binding pocket such that tyrosine and phosphotyrosine bind with equal affinity. As a result, MEK activity:

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#Question id: 11994

#Unit 10. Ecological Principles

In mountainous areas of western North America, north-facing slopes would be expected to

TLS Online TPP Program

#Question id: 11119

#Unit 7. System Physiology – Animal

Which one of the following is NOT true of inspiration

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#Question id: 12640

#Unit 6. System Physiology – Plant

Plant species produce a which type of  defensive proteins that bind to carbohydrates or carbohydrate-containing proteins. After being ingested by an herbivore, that bind to the epithelial cells lining the digestive tract and interfere with nutrient absorption