Which pair represents different conformations?

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#Question id: 32240

#Unit 2. Cellular Organization

Which one of the following GTPase switch protein activated at the ER membrane?

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#Question id: 8917

#Unit 9. Diversity of Life Forms

The Hox genes came to regulate each of the following in what sequence, from earliest to most recent?

1. identity and position of paired appendages in protostome embryos

2. formation of water channels in sponges

3. anterior-posterior orientation of segments in protostome embryos

4. positioning of tentacles in cnidarians

5. anterior-posterior orientation in vertebrate embryos

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#Question id: 3521

#Unit 8. Inheritance Biology

Which of the following is incorrect about independent assortment?

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#Question id: 12321

#Unit 10. Ecological Principles

Based on the intermediate disturbance hypothesis, a community's species diversity is

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#Question id: 12375

#Unit 10. Ecological Principles

When lichens grow on bare rock, they may eventually accumulate enough organic material around them to supply the foothold for later rooted vegetation. These early pioneering lichens can be said to do what to the later arrivals?