Download App

Origin and Evolution of Life — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYOrigin and Evolution of Life2 Marks
Question
Why variations are seen in population?
✓

Answer

Variations are seen in population due to gene flow, genetic drift, genetic recombinations that occur at the time of gamete formation, crossing over and sudden drastic changes like gene mutations or chromosomal aberrations. All the above factors are constantly operating over every population. Due to these evolutionary processes, variation take place in a population.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following questions." from Origin and Evolution of Life→Origin and Evolution of Life — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

How was the earth's atmosphere formed?
→
What is parthenogenesis? Give two examples.
→
Column AColumn B
(1) Forebrain————–
(2) Midbrain————–
(3) Hindbrain————–
→
Discuss the role the enzyme DNA ligase plays during DNA replication.
→
Give reasons : Prevention is better than cure for AIDS.
→
Why is medical termination of pregnancy (MTP) carried out?
→
What are linked genes? How can a pair of linked gene be identified?
→
Name two biological products produced by transgenic animals and their use for human beings.
→
How a portal vein differs from normal vein?
→
A3' ............ 5'B
C5’ ........... 3'D.
AB and CD represent two strands of a DNA molecule. When this molecule undergoes replication, forming a replication fork between A and C in the above.
  1. Name the templete strand for replication.
  2. Using which strand as the templete, will there be continuous synthesis of a complementary DNA strand
  3. Complementary to which strand will okazaki segments get synthesised, discontinuous synthesis occurs.
  4. What are templete strands and Okazaki pieces?
  5. In which direction is a new strand synthesised?
→