<span>It says: </span>Prokaryotic cells<span> have a simpler structure than eukaryotic </span>cells.<span> Evidence shows that eukaryotic </span>cells<span> evolved from </span>prokaryotic cells.<span> ... </span>Prokaryotes<span> have metabolic functions that eukaryotic </span>cells<span> lack.</span>
D- because the organisms are not genetically related , but developed this trait independently of each other
Answer:
a. The purple allele is lethal in the homozygous state
Explanation:
You cross a purple parrot with a true breeding (homozygous) white parrot and you get 1/2 purple parrots and 1/2 white parrots. This result can only happen if the purple parrot is heterozygous and the white parrot is homozygous recessive (if any of the parents had been homozygous dominant, 100% of the offspring would have had the dominant phenotype).
Then: Pp (purple) X pp (white) ---> 1/2 Pp, 1/2 pp
When you cross two purple parrots you get 1/3 white parrots and 2/3 purple parrots. The 2:1 phenotypic ratio is typical of a lethal allele in the homozygous state.
In a cross of two purple parrots: Pp
X Pp, one would expect the genotypic ratios 1 PP : 2 Pp : 1pp and the phenotypic ratios 3 Purple : 1 white.
But the PP genotype is lethal, so those individuals die and the only purple parrots we see are the heterozygous ones.
Because they are plant cells , animal cells are oval like with a rigid outer layer.A plant cell is the only cell out of plant and animal that has a cell wall+cell membrane
c. high porosity and high permeability