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Define heliophytes and sciophytes. Name a plant from your locality tha...

Define heliophytes and sciophytes. Name | Class 12 Biology Chapter Organisms and Population, Organisms and Population NCERT Solutions

Welcome to the NCERT Solutions for Class 12 Biology - Chapter Organisms and Population. This page offers a step-by-step solution to the specific question from Exercise 0, Question 4: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 4:

Define heliophytes and sciophytes. Name a plant from your locality that is either heliophyte or sciophyte.

Answer:

Heliophytes are photophilous or sun loving plants which grows in strong sunlight. For example: sunflower, mango etc.

Sciophytes are photophobic or shade loving plants which grows in shade. Example: Abies, Taxus etc.

Heliophytes	Sciophytes
Small, narrow, thick and linear leaves, internodes are short.	Large, broad and thin leaves, internodes are long.
Have high rate of transpiration.	Have low rate of transpiration.
They are profusely branched having thick and hard stem with well- developed extensive root system and contains sunken stomata.	They are sparsely branched having thin and soft stem with few roots and contains surface stomata.
Palisade tissue is well developed.	Spongy tissue is well- developed.
The chlorophyll ratio a to b is very much higher.	The chlorophyll ratio a to b is little lesser than that of heliophytes.

Other Questions of Chapter Organisms and Population

Q: If a population growing exponentially double in size in 3 years, what is the intrinsic rate of increase (r) of the population?

Q: Distinguish between the following:
(a) Hibernation and Aestivation
(b) Ectotherms and Endotherms

Do you agree that regional and local variations exist within each biome? Substantiate your answer with suitable example.

What would be the growth rate pattern, when the resources are unlimited?

Q: An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and the mango tree?

Why do high altitude areas have brighter sunlight and lower temperatures as compared to the plains?

Q: Define population and community.

The following diagrams are the age pyramids of different populations. Comment on the status of these populations.

Why are coral reefs not found in the regions from west Bengal to Andhra Pradesh but are found in Tamil Nadu and on the east coast of India?

Q: List any three important characteristics of a population and explain

Popular questions of class 12 Biology

Q: What is spermatogenesis? Briefly describe the process of spermatogenesis.

Q: Why is reproduction essential for organisms? Answer

Q: With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.

Q: What is DNA fingerprinting? Mention its application.

Q: What is oogenesis? Give a brief account of oogenesis.

Q: Describe the structure of a seminiferous tubule.

Q: What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

Q: With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.

Q: Explain the Law of Dominance using a monohybrid cross.

Q: What are sacred groves? What is their role in conservation?

Recently Viewed Questions of Class 12 Biology

Taking examples under each category, discuss upstream and downstream processing.

Name the first transgenic cow. Which gene was introduced in this cow?

Q: Diagrammatically represent the experimental steps in cloning and expressing an human gene (say the gene for growth hormone) into a bacterium like E. coli ?

Q: Explain what is meant by biofortification.

What is the main idea behind “Joint Forest Management Concept” introduced by the Government of India?

Q: List two essential roles of ribosome during translation.

Q: Try to trace the various components of human evolution (hint: brain size and function, skeletal structure, dietary preference, etc.)

Which type of food would have lactic acid bacteria. Discuss their useful application.

Give the full form of ELISA. Which disease can be detected using it? Discuss the principle underlying the test.

Q: Explain briefly
(a) PCR
(b) Restriction enzymes and DNA
(c) Chitinase

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Organisms and Population.
Review previous year question papers to get an idea of how such questions may be framed in exams.
Practice answering questions within the time limit to improve your speed and accuracy.
Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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