Scientists observe a newly established population of sexually reproducing plants growing on the shore of a small island. an observable trait of the plant has two possible phenotypes. it is determined by a single gene, with the dominant allele having complete dominance over the recessive allele. the first generation had 26 plants with the dominant trait and 25 with the recessive trait. the data below is from the first six generations of this population: generation number of individuals with dominant trait number of individuals with recessive trait total number of individuals 1 26 25 51 2 102 0 102 3 375 125 500 4 469 156 625 5 562 188 750 6 255 200 455 answer each part of this question completely in the space provided. use the data to explain the changes in phenotypic frequency from generation 1 to 3. do you think this population is in hardy-weinberg equilibrium? support your answer. propose a possible explanation for the change in phenotype frequency from generation 5 to generation 6.

Mantle convection  is the slow  creepingmotion of earth's solid silicate  mantle  caused by  convection  currents carrying  heat from the interior  to the planet's surface.[1][2]  the earth's surface  lithosphere, which rides atop the  asthenosphere  (the two components of the  upper mantle), is divided into a number of  plates  that are continuously being created and consumed at their opposite  plate boundaries. accretion occurs as mantle is added to the growing edges of a plate, associated with  seafloor spreading. this hot added material cools down by  conduction  and  convection  of heat. at the consumption edges of the plate, the material has thermally contracted to become dense, and it sinks under its own weight in the process of  subduction  usually at an  ocean trench.[3]this subducted material sinks through the earth's interior. some subducted material appears to reach the lower mantle,[4]  while in other regions, this material is impeded from sinking further, possibly due to a phase transition from  spinel  to  silicate perovskiteand  magnesiowustite, an  endothermic reaction.[5]the subducted oceanic crust triggers  volcanism, although the basic mechanisms are varied. volcanism may occur due to processes that add buoyancy to partially melted mantle causing an upward flow due to a decrease in density of the partial melt.secondary forms of convection that may result in surface volcanism are postulated to occur as a consequence of intraplate extension[6]  and  mantle plumes.[7]it is because the mantle can convect that the  tectonic plates  are able to move around the earth's surface.[8]mantle convection seems to have been much more active during the  hadean  period, resulting in gravitational sorting of heavier molten  iron, and  nickel  elements and  sulphides  in the core, and lighter  silicate minerals  in the  mantle.