A large asteroid or comet impacted the earth.
If you were to draw a punnet square of two individuals with the genotypes Ss, there would be 1 box with ss, 2 boxes with Ss, and 1 box with SS.
The possible genotypes are SS, Ss, and ss.
The possible phenotypes are sufferers of sickle cell (ss) and non-sufferers (Ss and SS)
True
because producers make their own food without depending on others. So in this case plants are producers is true because they make their own food with photosynthesis.
