Answer;
-Prader-Willi syndrome
Explanation:
-Prader-Willi syndrome (PWS) is a disorder caused by a deletion or disruption of genes in the proximal arm of chromosome 15 or by maternal disomy in the proximal arm of chromosome 15.
-The commonly associated characteristics of this disorder include diminished fetal activity, obesity, hypotonia, short stature, hypogonadotropic hypogonadism, strabismus, and small hands and feet.
Ecologists are the persons who study the interrelationships between organisms and their environments. Like they research upon the species found in forests or deserts interact with each other and as well as their surroundings.
They test whether a species is occupying its complete fundamental niche or only a portion of it by observing if the species are expanding their range after the removal of a competitor because two species with the same fundamental niche will exclude other competing species.
Hybridization is categorized as crossing organisms that have different traits to bring together the best of each. However, this can come with some post-zygotic barriers.
Reduced hybrid viability: hybrid offspring does not survive
Reduced hybrid fertility: hybrid offspring cannot reproduce
hybrid breakdown: first generation of hybrids are viable and fertile, however, their offspring (generation 3) are sterile.
Answer: Cell differentiation can be defined as a process in which the less specified cell is converted into the more specified cell. The cells at the embryonic stages is less specialized and during the process of development it becomes more specialized and this process is regulated by gene expression. The gene expression involves a specific group of genes which is expressed or suppressed, that decides the function of the cell.
A fertilized egg shows a single cell which is non-specialized that will become complex and will turn into a multicellular organism by cell differentiation.
This is the reason the adult rabbit looks so different from the single fertilized egg.
Megaparsec is the correct answer.