Testosterone is an example of a chemical signal that affects the very cells that synthesize it, the neighboring cells in the testis, along with distant cells outside the gonads. Thus, testosterone is an example of ________.

 I) an autocrine signal

 II) a paracrine signal

 III) an endocrine signal

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#Question id: 3281

#SCPH06 I Botany

One population X has 750 AA, 0 Aa, and 250 aa; the other Y has 500 AA, 500 Aa, and 0 aa. After one generation of random mating, the genotype frequencies X and Y respectively if the population size remains 1,000.

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#Question id: 14350

#SCPH05 I Biotechnology

Henry's law relates 

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#Question id: 18641

#I Life Science/ Life Sciences Group – I-V

Which one of the following is NOT an algorithm for building phylogenetic trees? 

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#Question id: 10252

#SCPH05 I Biotechnology

When molecular oxygen is unavailable—for example, in plant roots in flooded soils—glycolysis can be the main source of energy for cells, How?

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#Question id: 4346

#SCPH06 I Botany

Which of the following results would occur if the repressor of an inducible operon were mutated so that it could not bind the operator?