Internal means its on the inside
external means its on the outside
so an internal regulator is when the proteins respond to events on the inside of a cell
and an external regulator is when the proteins respond to events outside the cell
The ciliates<span> have both a </span>micronucleus<span> and </span>macronucleus<span>, which appear quite homogeneous in composition. The organelles of protozoa have functions similar to the organs of higher animals. The </span>plasma membrane<span> enclosing the </span>cytoplasm<span> also covers the projecting locomotory structures such as </span>pseudopodia<span>, </span>cilia<span>, and </span>flagella<span>.
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Answer: Option A.
Achondrogenesis
Explanation:
Sonographic findings of severe micromelia, decreased or absent ossification of the spine, macrocephaly, and micrognathia are conditions of Achondrogenesis because
Achondrogenesis is a genetic disorder that is as a result of mutations in gene SLC26A2 which is responsible for cellular transport proteins that is needed for the growth and development of bones and cartilage. This condition lead to malformation of bones and cartilage and it is characterized by short limbs, small body, narrow chest ,prominent abdomen,underdeveloped lungs,lack of ossification in the spine and pelvis, prominent head, small chin e.t.c.
It is a condition that affects infants.
The major treatment is pallative care in which the doctor have to reduce pain stress of bones and cartilage and also genetic councellling.
