Can you think of a scientific explanation, besides analogy used by Paul Ehrlich, for the direct relationship between diversity and stability of an ecosystem?

Restriction enzymes should not have more than one site of action in the cloning site of a vector. Comment.

(a) What would happen if a large volume of untreated sewage is discharged into a river?
(b) In what way anaerobic sludge diagestion is important in sewage treatments?

Q: In which way have microbes played a major role in controlling diseases caused by harmful bacteria?

Q: Suggest some methods to assist infertile couples to have children.

What is diapause and its significance?

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

Fill in the blanks:
(a) Humans reproduce __________. (asexually/sexually)
(b) Humans are__________. (oviparous/viviparous/ovoviviparous)
(c) Fertilization is __________ in humans. (external/internal)
(d) Male and female gametes are __________. (diploid/haploid)
(e) Zygote is __________. (diploid/haploid)
(f) The process of release of the ovum from a mature follicle is called__________.
(g) Ovulation is induced by a hormone called the __________.
(h) The fusion of male and female gametes is called _____________.
(i) Fertilisation takes place in _____________.
(j) Zygote divides to form _____________which is implanted in uterus.
(k) The structure which provides vascular connection between fetus and uterus is called ____________.

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 Human Reproduction.
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.

Comments

Raju Kapar
2019-07-31 22:07:51

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Anandraj
2019-07-09 01:02:34

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Aditi
2018-05-11 19:51:31

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nazeefa
2017-04-03 11:38:30

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Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 2: Draw a labeled diagram of male reproductive system.....

Draw a labeled diagram of male reproduct | Class 12 Biology Chapter Human Reproduction, Human Reproduction NCERT Solutions

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