A female fly, full of fertilized eggs, is swept by high winds to an island far out to sea. She is the first fly to arrive on this island, and the only fly to arrive in this way. Thousands of years later, her numerous offspring occupy the island, but none of them resembles her. There are, instead, several species each of which eats only a certain type of food. None of the species can fly, for their flight wings are absent, and their balancing organs (i.e., halteres) are now used in courtship displays. The male members of each species bear modified halteres that are unique in appearance to their species. Females bear vestigial halteres. The ranges of all of the daughter species overlap. If these fly species lost the ability to fly independently of each other as a result of separate mutation events in each lineage, then the flightless condition in these species could be an example of

TLS Online TPP Program

#Question id: 34158

#Unit 7. System Physiology – Animal

Which of the following hormone induce Adrenal medullary PNMT?

TLS Online TPP Program

#Question id: 34159

#Unit 7. System Physiology – Animal

Mice lacking dopamine β-hydroxylase are cold-intolerant but have high basal metabolic rate because:

TLS Online TPP Program

#Question id: 34160

#Unit 7. System Physiology – Animal

The causes of ACTH-independent Cushing syndrome include following, EXCEPT? 

TLS Online TPP Program

#Question id: 34161

#Unit 7. System Physiology – Animal

Congenital defects in the enzymes lead to deficient cortisol secretion and the syndrome of congenital adrenal hyperplasia. A cause of severe congenital adrenal hyperplasia in newborns is a loss of function mutation of the gene for the: 

TLS Online TPP Program

#Question id: 34162

#Unit 7. System Physiology – Animal

Gonadal and adrenocortical steroids are of following types, EXCEPT? 

TLS Online TPP Program

#Question id: 34163

#Unit 7. System Physiology – Animal

Which of the following represents the correct sequential pathway for aldosterone synthesis from cholesterol, based on the enzyme-catalyzed steps?