Answer:
Correct option is (B). Nyctalopia affects vision in the fovea centralis, resulting in impaired vision.
Explanation:
Nyctalopia which is also known as night blindness, in this condition it's difficult to see in relatively low light. It can cause by two types one is from birth, and another is injury or vitamin A deficiency which is also called as malnutrition.
It is caused by the loss of normal rod function in retina, and loss their ability to response in the light. The outer part of retina is made up of more rods compare to cones, loss of peripheral area repeatedly results in night blindness.
Algae live in bodies of water and damp places and are commonly found in both aquatic and terrestrial environments. Terrestrial algae mostly live in moist, tropical areas. They prefer wet places, because they do not have vascular tissues and the other necessary adaptations to survive on land.
The plants ploidy is decided based on the chromosome within the nucleus . Plant can be either heterozygous or homozygous.
The major distinction between homozygous and heterozygous individuals is that the former have two identical alleles while the latter have both dominant and recessive alleles. Over several generations, kids with the same characteristic are produced through self-breeding between homozygous individuals.
Heterozygous and homozygous chromosomes are seen in human beings. Allele pairings are categorized as Heterozygous and Homozygous. A heterozygous person possesses various alleles, whereas a homozygous person carries a pair of identical (RR or rr) alleles (Rr).
Let's take the gene for hair colour as an example. This gene has two alleles, one of which is responsible for black (r), and the other for black (R). On a homologous set of chromosomes, such as RR or rr, homozygous people will carry the same colour allele, but heterozygous people will carry distinct colour alleles.
Hence, depending on type allele can be homozygous or heterozygous.
To know more about Chromosome.
brainly.com/question/296477
#SPJ4
