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.

#Question id: 2283

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

Most cells are very small. A typical eukaryotic cell, both plant and animal, will occur in which of the following size ranges?

#Question id: 11422

#SCPH28 | Zoology

The values of temperature and precipitation used to define climate zones correspond to the conditions of moisture and cold stress that are particularly important determinants of plant form. Which of following is correct combination of Biome?

#Question id: 2996

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

Cell death approximately equal to cell division is found in

#Question id: 4933

#SCPH06 I Botany

What structure do protocells have in common with current cells?

#Question id: 4152

#SCPH28 | Zoology

The pathway for polypeptides exported from E. coli includes the following steps, which occur in what order for correct export?

1.  A chaperone, SecA, binds to the polypeptide.

2.  A chaperone, SecB, binds to the polypeptide.

3.  ATP is hydrolyzed by Sec A.

4.  SecA pushes 20 amino acids of the polypeptide into the translocation complex.