<span>The total number of genes present in a population is called the gene pool. Hope this helps </span>
The deep sea vent organisms or benthic organisms normally live in dark conditions because of no penetration of sunlight. These organisms in order to colonize ocean surface must develop photo sensory receptors and should adapt to the light conditions along with variation in temperatures and pressure in ocean currents.
<span>D.water and carbon dioxide</span>
Carbon Dioxide (CO2) and Water (H2O)
