Which statements best describe how the great rift valley in africa formed? check all that apply.
the rift valley formed when the crust pulled apart.
the rift valley formed at a divergent boundary.
the rift valley formed similarly to an island arc.
the rift valley formed at a convergent boundary.
the rift valley formed when tectonic plates separated.

The answer is;

The rift valley formed when the crust pulled apart.

The rift valley formed at a divergent boundary.

Divergent boundaries occur when two adjacent convection currents in the mantle are spinning in opposite directions. This causes the upper crust to stretch creating tension due to drag in different directions on the local region. The tension causes the crust to crack severally and the middle crust block dropping in comparison to flanking regions.  

answer; i believe its (ovulation);

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.