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Biology

General

Easy

Question

Which was absent in the atmosphere at the time of origin of life?

$N H_{3}$
$H_{2}$
$O_{2}$
$C H_{2}$

The correct answer is: $O subscript 2 end subscript$

Primitive atmosphere of earth was reducing containing methane, ammonia, hydrogen and water vapour. There was no free oxygen.

Related Questions to study

How might an evolutionary biologist explains why a species of birds has evolved a larger beak size?

How might an evolutionary biologist explains why a species of birds has evolved a larger beak size?

Which of the following is an atavistic character?
I. Body hairs

II. Enlarged canines

III. Presence of six fingers

IV. Presence of tail in some babies

The correct combination is

Which of the following is an atavistic character?
I. Body hairs

II. Enlarged canines

III. Presence of six fingers

IV. Presence of tail in some babies

The correct combination is

True statements regarding the genetic drift are
I. It mostly occurs in smaller population

II. Certain alleles can be lost forever because of genetic drift

III. Founder effects and bottle neck effects are caused by genetic drift

IV. Mutations are primarly responsible for genetic drift

The correct combination showing true statement is

True statements regarding the genetic drift are
I. It mostly occurs in smaller population

II. Certain alleles can be lost forever because of genetic drift

III. Founder effects and bottle neck effects are caused by genetic drift

IV. Mutations are primarly responsible for genetic drift

The correct combination showing true statement is

parallel

The animal called evolved into the first amphibians that lived on both land and water.
Complete the given statement by choosing an appropriate option

The animal called evolved into the first amphibians that lived on both land and water.
Complete the given statement by choosing an appropriate option

Darwin’s finches are a good example of

Darwin’s finches are a good example of

$D r y o p i t h e c u s$ is also called as

$D r y o p i t h e c u s$ is also called as

parallel

Which era is called the age of angiosperms?

Which era is called the age of angiosperms?

Which of the following features are connected with the modern theory of evolution?
I. Genetic and chromosomal mutation

II. Genetic recombination and natural selection

III. Reproductive isolation

The correct combination is

Which of the following features are connected with the modern theory of evolution?
I. Genetic and chromosomal mutation

II. Genetic recombination and natural selection

III. Reproductive isolation

The correct combination is

Which of the following is not a concept of Lamarck?

Which of the following is not a concept of Lamarck?

parallel

Which of the following was formed in S Miller’s experiment?

Which of the following was formed in S Miller’s experiment?

Which of the following statements are incorrect?
I. Microbial experiment shows that when the pre-existing advantagoeus mutations are selected they will result in the observation of new phenotypes. Over few generations, this would results in speciation

II. Neanderthal fossils represents a human relative.

III. In 1938, a fish caught in South Africa happened to be a coelacanth (lobe fins) which was thought to be extinct. These animals evolved into the first living amphibian on both land and water

IV. Lichens can be used as water pollution indicators

V. Alfred Wallace, a naturalist, who worked in Malay Archepalago (present Indonesi(a) had also came to the similar conclusion on natural selection as reached by Darwinism

The correct option is

Which of the following statements are incorrect?
I. Microbial experiment shows that when the pre-existing advantagoeus mutations are selected they will result in the observation of new phenotypes. Over few generations, this would results in speciation

II. Neanderthal fossils represents a human relative.

III. In 1938, a fish caught in South Africa happened to be a coelacanth (lobe fins) which was thought to be extinct. These animals evolved into the first living amphibian on both land and water

IV. Lichens can be used as water pollution indicators

V. Alfred Wallace, a naturalist, who worked in Malay Archepalago (present Indonesi(a) had also came to the similar conclusion on natural selection as reached by Darwinism

The correct option is

The study of the homologous structures in mature organisms provides the evidence for the evolutionary relationships among certain groups of organisms. Which field of the study includes this evidence of evolution?

The study of the homologous structures in mature organisms provides the evidence for the evolutionary relationships among certain groups of organisms. Which field of the study includes this evidence of evolution?

parallel

Organic compounds first evolved in earth required for origin of life were

Organic compounds first evolved in earth required for origin of life were

First seed plant appeared during which period?

First seed plant appeared during which period?

Which one is linked to evolution?

Which one is linked to evolution?

parallel

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