What is the cell structure of protista

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.

What class of levers is shown in this image?