Biology
General
Easy
Question
In the early earth, organic acids were produced by the combination of 
with
- Ammonia and methane
- Hydrogen
- Organic matter
- Sulphates and nitrates
The correct answer is: Ammonia and methane
Stanley Miller and Harold Urey built an apparatus of glass tube and flasks in laboratory. He created early earth atmosphere containing hydrogen, methane, ammonia and water vapours and produced simple organic acids such as urea, hydrogen cyanide, sugars, purines, pyrimidines and amino acids.
Related Questions to study
Biology
Major radiations of mammals, birds and pollinating insects took place in which epoch?
Major radiations of mammals, birds and pollinating insects took place in which epoch?
BiologyGeneral
Biology
Cosmozoic theory was proposed by
Cosmozoic theory was proposed by
BiologyGeneral
Biology
Bird with average sized wings survived in the severe strom but the short winged birds died. It shows
Bird with average sized wings survived in the severe strom but the short winged birds died. It shows
BiologyGeneral
General
If 
then x lies in
If then x lies in
GeneralGeneral
General
An egg is released and fertilised by sperm at which stage
An egg is released and fertilised by sperm at which stage
GeneralGeneral
General
The cavity contained in graffian follicle is
The cavity contained in graffian follicle is
GeneralGeneral
Maths-
Five persons entered the lift cabin on the ground floor of an 8-floor house. Suppose each of them can leave the cabin independently at any floor beginning with the first. Find the total number of ways in which each of the five persons can leave the cabin
i) at any one of the 7 floors
Five persons entered the lift cabin on the ground floor of an 8-floor house. Suppose each of them can leave the cabin independently at any floor beginning with the first. Find the total number of ways in which each of the five persons can leave the cabin
i) at any one of the 7 floors
Maths-General
Maths-
If N = 7p+4.5q.23 is a perfect cube, where 'p' and 'q' are positive integers, the smallest possible value of 'p + q' is-
If N = 7p+4.5q.23 is a perfect cube, where 'p' and 'q' are positive integers, the smallest possible value of 'p + q' is-
Maths-General
Maths-
For 3 r n nCr + 3 nCr–1 + 3 nCr–2 + nCr–3 is-
For 3 r n nCr + 3 nCr–1 + 3 nCr–2 + nCr–3 is-
Maths-General
Maths-
The number of different words of three letters which can be formed from the word "PROPOSAL", if a vowel is always in the middle are-
The number of different words of three letters which can be formed from the word "PROPOSAL", if a vowel is always in the middle are-
Maths-General
Maths-
The total number of positive integral solution of abc = 24 is
The total number of positive integral solution of abc = 24 is
Maths-General
Maths-
Four couples (husband and wife) decide to form a committee of four members. The number of different committees that can be formed in which no couple finds a place is
Four couples (husband and wife) decide to form a committee of four members. The number of different committees that can be formed in which no couple finds a place is
Maths-General
Maths-
The total number of ways in which n2 number of identical balls cane be put in n numbered boxed (1, 2, 3, ……n) such that ith box contains at least i number of balls, is -
The total number of ways in which n2 number of identical balls cane be put in n numbered boxed (1, 2, 3, ……n) such that ith box contains at least i number of balls, is -
Maths-General
Maths-
A person writes letters to 6 friends and addresses the corresponding envelopes. In how many ways can the letters be placed in the envelopes so that at least 4 of them are in wrong envelopes ?
A person writes letters to 6 friends and addresses the corresponding envelopes. In how many ways can the letters be placed in the envelopes so that at least 4 of them are in wrong envelopes ?
Maths-General
Maths-
Sum of all divisors of 5400 whose unit digit is 0, is -
Sum of all divisors of 5400 whose unit digit is 0, is -
Maths-General
