The right answer is A. Skin cells forming from sunlight.
The liver is an organ endowed with a fantastic ability to regenerate
. Thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.
Prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.
Ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.
Answer:
Phenotypic ratio 1:1:1:1
Explanation:
A test cross is a cross between an individual with heterozygous genotype and a homozygous recessive individual, in order to ascertain the actual genotype of the dominant parent i.e whether homozygous or heterozygous.
In this case, which is a dihybrid cross involving two genes A and B. The allele A is dominant over allele a, since it masks the expression in a heterozygous state. The same applies for allele B and b.
Therefore, allele A and B are dominant alleles while allele a and b are recessive alleles.
In a cross between an heterozygous parent (AaBb) and a homozygous recessive (aabb), each individual will undergo meiosis and produce gametes. According to Mendel's law of independent assortment, the alleles of each individual get sorted into gametes independent of one another.
The four possible gametes produced by each parent are:
AaBb: AB, Ab, aB, ab
aabb: ab, ab, ab, ab
Thus, using a punnet square (see attached image), the possible 16 progenies will possess four different genotypes: AaBb (4), Aabb (4), aaBb(4), aabb(4)
Considering the four distinct genotypes, the phenotypes will also differ. Hence, the phenotypic ratio: 4:4:4:4 ~ 1:1:1:1
Answer: option D - the electron transport system
Explanation:
The electron transport system BASICALLY involves the transfer ofelectrons from NADH to oxygen coupled with the synthesis of ATP.
Note that electron transport system occurs in the INNER Mitochondrial membranes.