Question
Mention the two principles through which Lamarck explained his ideas.
✓
Answer
(a) Use and disuse:
Parts of the body which are used extensively become larger and stronger, while those which are not used deteriorate.
(b) Inheritance of acquired characters:
An organism could pass its modifications to its offspring.
Parts of the body which are used extensively become larger and stronger, while those which are not used deteriorate.
(b) Inheritance of acquired characters:
An organism could pass its modifications to its offspring.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
“First meiotic division is the reduction division” what does the word ‘reduction’ refer to in this statement?
What are the advantages of transpiration to the plant?
Give suitable explanation for the following:
More transpiration occurs from the lower surface of a dorsiventral leaf.
More transpiration occurs from the lower surface of a dorsiventral leaf.
Two pairs (A & B) of rabbits were crossed as given below:
(a) Can you tell which coat colour (black or white) is dominant? ________ .
(b) Is the coat colour sex-linked? ________ .
(a) Can you tell which coat colour (black or white) is dominant? ________ .
(b) Is the coat colour sex-linked? ________ .
The figure given below shows the stages of ripening in a banana. Answer the question that follow: 
Mention two characteristic features of this hormone.
Mention two characteristic features of this hormone.
Differentiate between the following
Plasmolysis and Deplasmolysis.
Plasmolysis and Deplasmolysis.
In a school experiment, students observed the growth patterns of bean plants placed near a window. They noticed that the plants bent towards the light coming through the window. Additionally, they conducted another experiment by placing the plants horizontally. After a few days, they ohserved that the roots grew downwards while the shoots grew upwards, demonstrating different types of tropic movements. Which types of tropic movements were observed in the bean plants during the experinents? Explain them,
Phototropism and geotropism are the tropic movements, noticed during the experiment.
Phototropism and geotropism are the tropic movements, noticed during the experiment.
List any three major factors that accelerate the rate of transpiration.
Given below is the figure of certain organs and associated parts in the human body. Study the same and answer the question that follow:
Name the parts numbered 1 to 5.
Name the parts numbered 1 to 5.
How many types of transpiration are found in plants?