Download App

Heredity and Evolution — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceHeredity and Evolution3 Marks
Question
How does comparing DNA of different specials help in tracing evolutionary relationship?
✓

Answer

Comparing of DNA is known as molecular phylogeny species deduced from fossils record to be closely related are more similar in their DNA than as species thought to be more distinctly related.
Tracing evolutionary relationships between organisms is called as phylogeny while studying structures of various DNAs to establish evolutionary relationships between them is called as, while studying structures of various DNAs to establish evolutionary relationships between them is called as molecular phylogeny.

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 "[3 Mark Questions]" from Heredity and Evolution→Heredity and Evolution — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

A ray of light travelling in air is incident on a rectangular glass block and emerges out into the air from the opposite face. Draw a labelled ray diagram to show the complete path of this ray of light. Mark the two points where the refraction of light takes place. What can you say about the final direction of ray of light?
→
Draw ray-diagrams to show the formation of images when the object is placed in front of a concave mirror (converging mirror):
  1. Between its pole and focus.
  2. Between its centre of curvature and focus Describe the nature, size and position of the image formed in each case.
→
How can we help in reducing the problem of waste disposal? Suggest any three methods.
→
An object of 5.0cm size is placed at a distance of 20.0cm from a converging mirror of focal length 15.0cm. At what distance from the mirror should a screen be placed to get the sharp image? Also calculate the size of the image.
→
With the help of an activity, explain the method inducing electric current in a coil with a moving magnet. State the rule used to find the direction of electric current thus generated in the coil.
→
Identify the compound of calcium which is yellowish white powder and is used for disinfecting drinking water. Write its chemical name and formula. How is it manufactured? Write the chemical equation for the reaction involved. Also, list two other uses of the compound.
→
What will happen to the rate of photosynthesis in a plant under the following circumstances?
  1. Cloudy day in morning but bright sunshine in the afternoon.
  2. No rainfall in the area for a considerable time.
  3. Gathering of dust on the leaves.
→
How does inserting the control rods in the graphite core affect the fission in the reactor? Explain your answer.
→
How is ozone formed in the upper atmosphere? Why is damage to ozone layer a cause of concern to us? What causes this damage?
→
What were the limitations of Dobereiner’s classification of elements?
→