Biology
General
Easy
Question
First mammal occurred in which era/period?
- Permian –Palaeozoic
- Triassic –Mesozoic
- Tertiary –Coenozoic
- None of these
The correct answer is: Triassic –Mesozoic
The Triassic period of Mesozoic era, the primitive amphibians became extinct some of the reptilian group returned to sea-life and some invaded air. Another important event which took place late in Triassic period was the first appearance of mammals, which retained egg laying habit.
Related Questions to study
Biology
Diagram given below indicates
Diagram given below indicates
BiologyGeneral
BiologyGeneral
Biology
Thorns of 
and tendrils of 
are examples of
Thorns of and tendrils of are examples of
BiologyGeneral
Biology
evolved about 1.7 million years ago. They used fire and tools and also used animal hides as clothing. The fossil of were named as
evolved about 1.7 million years ago. They used fire and tools and also used animal hides as clothing. The fossil of were named as
BiologyGeneral
Biology
Comparative anatomy and morphology shows …A… and …B… among organisms of today and those that existed years ago. Such similarities can be interpreted to understand whether …C… ancestors were shared or not
Choose the correct option for A, B and C the complete the given NCERT statement
Comparative anatomy and morphology shows …A… and …B… among organisms of today and those that existed years ago. Such similarities can be interpreted to understand whether …C… ancestors were shared or not
Choose the correct option for A, B and C the complete the given NCERT statement
BiologyGeneral
Biology
Homology refer to
I. Divergent evolution
II. Common descent
III. Convergent evolution
Choose the correct option
Homology refer to
I. Divergent evolution
II. Common descent
III. Convergent evolution
Choose the correct option
BiologyGeneral
Biology
All organisms shares the same genetic code. This commonality is an evidence that
All organisms shares the same genetic code. This commonality is an evidence that
BiologyGeneral
Biology
Mendel described the frequency of …A… for offsprings of a single …B…
Choose the correct options for A and B to complete the given NCERT statement
Mendel described the frequency of …A… for offsprings of a single …B…
Choose the correct options for A and B to complete the given NCERT statement
BiologyGeneral
Maths-
how many ways can the letters of the word ARRANGE be arranged so that
iii) Neither two A’s nor the two R’s are together.
how many ways can the letters of the word ARRANGE be arranged so that
iii) Neither two A’s nor the two R’s are together.
Maths-General
Maths-
how many ways can the letters of the word ARRANGE be arranged so that
ii) The two A’s are together but not the two R’s are together.
how many ways can the letters of the word ARRANGE be arranged so that
ii) The two A’s are together but not the two R’s are together.
Maths-General
Maths-
In how many ways can the letters of the word ARRANGE be arranged so that
i) The two R’ s are never together
In how many ways can the letters of the word ARRANGE be arranged so that
i) The two R’ s are never together
Maths-General
Maths-
how many ways can 3 prizes be distributed among 4 boys, when
ii) a boy may get any number of prizes ?
how many ways can 3 prizes be distributed among 4 boys, when
ii) a boy may get any number of prizes ?
Maths-General
Maths-
In how many ways can 3 prizes be distributed among 4 boys, when
i) no boy gets more than one prize ?
In how many ways can 3 prizes be distributed among 4 boys, when
i) no boy gets more than one prize ?
Maths-General
Maths-
How many odd numbers, greater than 600000 can be formed from the digits 5, 6, 7, 8, 9, 0 if Repetitions are allowed.
How many odd numbers, greater than 600000 can be formed from the digits 5, 6, 7, 8, 9, 0 if Repetitions are allowed.
Maths-General
Maths-
how many ways four friends can put up in 8 hotels of a town if
iii) All the friends do not stay in same hotel?
how many ways four friends can put up in 8 hotels of a town if
iii) All the friends do not stay in same hotel?
Maths-General
Maths-
how many ways four friends can put up in 8 hotels of a town if
ii) No two friends can stay together.
how many ways four friends can put up in 8 hotels of a town if
ii) No two friends can stay together.
Maths-General
