Evolution Test - 49

A. Mesozoic - It is an era of Medieval life. Jurassic period is the age of reptiles.

A case of convergent evolution is the comparable idea of the wings of creepy crawlies, fowls, and bats. Every one of the four serves a similar capacity and is comparable in structure, however, each developed autonomously.

• The evolution of tetrapods began about 400 million years ago in the Devonian period.
  
• The earliest tetrapods are evolved from lobe-finned fishes.
• Tetrapoda, includes all living and extinct amphibians, reptiles, birds, and mammals.
• Hence ancestral amphibians were tetrapods that evolved during the Devonian period.
• So, the correct answer is 'Devonian period.

According to Hardy-Weinberg equilibrium, $$p^2$$ + $$2pq$$ + $$q^2$$ = 1. Where $$p^2$$ represents the frequency of homozygous dominant genotype, $$q^2$$ represents the frequency of homozygous recessive genotype and $$2pq$$ represents the frequency of heterozygous genotype. In the question $$p$$ = 0.6 (60%) and $$q$$ = 0.4 (40%). Hence the heterozygous genotype $$2pq$$ is given by 2x0.6x0.4 = 0.48. Converting that to percentage, the answer is 48%. 

Psychozoic:- Pertaining to the period of geological time characterized by the presence of human intelligence.

Reptiles were the overwhelming creature life shapes amid the Jurassic Period. Reptiles had conquered the developmental obstacles of help and proliferation that constrained the creatures of land and water. The absolute biggest creatures ever to live were dinosaurs of the Jurassic Period.

So, the correct option is 'Jurassic'.

The structures in different organisms which are not similar anatomically though they perform similar functions are called as analogous organs. The anatomically different structures evolved towards the same direction (i.e., towards the same function) due to adaptations to similar needs or similar habitats. This is called the convergent evolution because anatomically dissimilar and origin wise different structures converged towards the common function. Hence, analogous structures are the result if convergent evolution. Eye of the octopus and of mammals, flippers of penguins and dolphins, sweet potato and potato, etc., are the examples of analogous structures.

Rodents like the flying squirrel are all the more firmly identified with primates or some other placental mammal than they are to the sugar lightweight flyer, which is a marsupial. These creatures are a case of convergent evolution. Predecessors of present-day marsupials presumably split from those of current placental warm-blooded animals in the mid-Jurassic timeframe, back when Stegosaurus Allosaurus still meandered the Earth.

So, the correct option is 'Convergent evolution'.