Which of the following as a living fossil 

•  Pinus 

• Gnetum

• Ginkgo 

• Riccia

Which one is not correct?

• Human - Ureotelic

• Birds - Uricotelic

• Lizards - Uricotelic

• Whale - Ammonotelic

Dinosaurs become extinct in

• Permian age

• Triassic period

• Jurassic period

• Cretaceous period

254.

Which one of the following is vestigeal organ of human

• Hair

• Intestine

• Wisdom teeth

• Muscle of glottis

Stanley Miller performed an experiment to prove the origin of life. They took gases NH₃ and H₂ along with

• N₂ and H₂O

• H₂O and CH₄

• CH₄ and N₂

• CO₂ and NH₃

The first animal domesticated by primitive man was

• dog

• horse

• cat

• cow

Documented microfossils have been found that are as old as

• 2.5 billion years

• 1.5 billion years

• 3.5 billion years

• 2.5 million years

The correct sequence for the formation of chemicals on the primitive earth is

• NH₃, protein, carbohydrate and nucleic acid

• NH₃, water, nucleic acids and proteins

• NH₃, nucleic acids, protein and carbohydrate

• protein, carbohydrate, water and nucleic acids

Which of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters

• Absence of limbs in snakes

• Melanisation in peppered moth

• Presence of webbed toes in aquatic birds

• Lack of pigment in cave-dwelling animals

Keystone species deserve protection because these

• are capable of surviving in harsh environmental conditions

• indicate presence of certain minerals in the soil

• have become rare due to overexploitation

• play an important role in supporting other species.