Answer:
Option A
Explanation:
Thyroid is primarily caused by lack of iodine but there are other reasons as well that lead to increased size of the thyroid gland. Some of these reason is
a) over- or underproduction of thyroid hormones
b) Nodules in the glans
Some times, due to overstimulation immune system itself attack the thyroid gland thereby producing excess thyroxine and hence causing the thyroid to swell
Thus, Option A is correct
Covalent bond because a covalent bond is when it only shares electrons and it doesn't give or lose.
Answer:
Dominant character is expressed in both the condition i.e. heterozygous and homozygous.
Explanation:
In genetic the dominant allele is signified by capital letter and the allele which is recessive is signified by the smaller letter. The dominant character can be expressed in both the condition that is homozygous dominant(TT) or heterozygous dominant(Tt).
Therefore even the presence of a single allele of dominant character in the gene, the dominant character can mask or suppress the recessive trait from being appeared in the phenotype. Therefore pea plant that is heterozygous for the tallness trait have the dominant phenotype.
The name of the cell is GLIAL CELL. The glial cells surround neurons of both the central nervous system and the peripheral nervous system and provide support and insulation for them. They are also involved in maintenance of homeostasis and in production of myelin.
