It help pump things throught the plasma membrane
A system is contained by its boundary; therefore, the size of a system is limited by its boundary.
Answer: A
the two continents were once a single landmass.
South America and Africa were once together.
You can cross the plant with hom-ozygote and then recessive pollen. Then the height of the progeny will show whether the plant was heterozygous or hom-ozygous. That is how you can find out which one it is.
<span>Based on a simple Punnett square, you could predict that one of the offspring (with the genotype yy) would present with red leaves. The other three offspring would present the phenotype of the yellow leaves, because the dominant gene (Y) is present (genetypes Yy, yY, and YY).</span>
