Answer:
c. monozygotic
Explanation:
Monozygotic twins, though arising primarily from a single zygote and considered genetically identical, will not ever be absolutely the same. Post-fertilization events such as chromosomal mosaicism, skewed X-inactivation and imprinting mechanisms, as well as other epigenetic mechanisms are responsible for the putative differences between monozygotic twins.
Answer: Maintainance of constant internal environment is carried out in a process called Homeostasis.
Explanation:
Maintainance can of several types such as pH, temperature, and other substances such as Concentration of Ammonia in body. These all should maintain at constantly for stability in body. The maintenance of temperature is called thermo regulation.
Video: DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing. Learn the language of nucleotides as we look at the nitrogenous bases adenine, guanine, cytosine and thymine.
Answer:
Ego
Explanation:
In 1923, Sigmund Freud's personality theory was structured into three different parts viz: Id, ego and superego
The id is the instinctive and unconscious part of the personality which responds directly to urges, needs and desires. The id operates on the pleasure principle that every wishful impulse should be satiated instantly regardless of the resulting effect.
The ego is the part that mediates between the unreasonable id and societal beliefs. It is the reasoning and decision-making component of the psyche.
The superego is the part that acts as a self critical conscience, reflecting the social standards that has been learnt
In this scenario involving Cecil, the id part of his personality is responsible for the sexual attraction to his English teacher but the ego part of his personality is making him realize that is socially unreasonable for his teacher to respond to his sexual advances. His ego, which operates with the reality principle is restraining him from acting from his feelings in consideration of social realities.
Therefore, his ego is restraining him from expressing his feelings of sexual attraction (Id) considering societal consequences.
Tumor-suppresor genes inhibit cell division in the cell-cycle to repair DNA that is damaged or abnormal chromosomes to stop the mutation of such genes which causes pathology in the body.
