Phytochrome can interconvert between Pr and Pfr forms, Pr receives red light and converts into Pfr while Pfr receives far-red light and then converts into Pr, so which form of phytochrome is responsible for seed germinations?

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#Question id: 19866

#Unit 13. Methods in Biology

Which of the following variants of PCR has been devised to increase the specificity of PCR without lowering the efficiency by variation annealing temperature?

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#Question id: 3276

#Unit 11. Evolution and Behavior

Which of these conditions are always true of populations evolving due to natural selection?

Condition 1: The population must vary in traits that are heritable.

Condition 2: Some heritable traits must increase reproductive success.

Condition 3: Individuals pass on most traits that they acquire during their lifetime.

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#Question id: 11960

#Unit 7. System Physiology – Animal

Mechanical digestion, the process of breaking down large chunks of food into smaller pieces, is important because smaller pieces of food ________.

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#Question id: 7297

#Unit 5. Developmental Biology

How is the ABC model for floral identity in Arabidopsis similar to the models for homeotic gene function derived from studies in Drosophila?

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#Question id: 10822

#Unit 10. Ecological Principles

When two organisms attempt to utilize the same resource, the result is: