When three species of sunfish with similar niches were all placed in the same experimental pond, each made use of resources that they did not exploit in the absence of the other species. This scenario is referred to as

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#Question id: 1976

#Unit 4. Cell Communication and Cell Signaling

The MHC is important in a T cellʹs ability to

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#Question id: 1879

#Unit 4. Cell Communication and Cell Signaling

The β chain of the FcϵRI:

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#Question id: 14924

#Unit 8. Inheritance Biology

Which is NOT a characteristic that made peas useful as a model system for Mendel's studies?

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#Question id: 335

#Unit 1. Molecules and their Interaction Relevant to Biology

Suppose the major solutes in intact lysosomes are KCl (~0.1 M) and NaCl (~0.03 M). When isolating lysosomes, what concentration of sucrose is required in the extracting solution at room temperature (25 °C) to prevent swelling and lysis?

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#Question id: 10426

#Unit 6. System Physiology – Plant

low-fluence responses (LFRs) another set of phytochrome responses, which include;

a) It can be initiated when fluence reaches 1.0 µmol m–2, and they are saturated at about 1000 µmol m–2

b) promotion of lettuce seed germination

c) inhibition of hypocotyl elongation and regulation of leaf movements

d) It also inhibits the growth of the mesocotyl

Which of the following combinations is correct for LFRs?