Draw a Sectional View of Human Ovary and Label the Different Follicular Stages, Ovum and Corpus Luteum. - Biology


Draw a sectional view of human ovary and label the different follicular stages, ovum and Corpus luteum.

Draw a labeled diagram of a section through ovary.



Concept: Gametogenesis
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Chapter 3: Human Reproduction - Exercises [Page 56]


NCERT Biology Class 12
Chapter 3 Human Reproduction
Exercises | Q 13 | Page 56

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Women are often blamed for producing female children. Consequently, they are ill-treated and ostracised. How will you address this issue scientifically if you were to conduct an awareness programme to highlight the values involved?

Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions

(a) Acrosome

(b) Nucleus

(c) Middle piece

Fill in the blanks:

The fusion of the male and the female gametes is called __________.

What is spermatogenesis? Briefly describe the process of spermatogenesis.

Name the hormones involved in regulation of spermatogenesis.

Name the functions - Acrosome of sperm.

Describe the process of budding in hydra.

Fill in the blank. 

 Implantation of embryo occurs in ------ 

Fill in the blank.

---------- type of reproduction occurs without fusion of gametes. 

Body breaks up into several fragments and each fragment starts to live as a new individual. This is ______ type of reproduction.

Answer the following questions in short. 

Which precautions will you follow to maintain the reproductive health? 

In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples. 

Describe the process of oogenesis in human female.

At the time of birth, there are _______________ oocytes in the ovary of a female foetus.

In meiosis, the number of chromosomes becomes ___________.

What is gamete formation?

Give scientific reason.

Older women are more likely to give birth to children with some abnormalities.

Give scientific reason.

There is a menopause when women are 45-50 years old.

Explain two main process in sexual reproduction.

If newborns are produced at the age of menopause, they may be with some abnormalities. Why?

In angiosperms, the pollen germinates to produce a pollen tube that carries two gametes. What is the purpose of carrying two gametes when a single gamete can fertilize the egg?

If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?

Sex organs produce gametes which are diploid.

The male sex hormone testosterone is secreted from ____________.

The glandular accessory organ which produces the largest proportion of semen is ____________.

Mammalian egg is ____________.

The process which the sperm undergoes before penetrating the ovum is ____________.

The Androgen Binding Protein (ABP) is produced by ____________.

Answer the following type of question Assertion (A) and Reason (R).

(A) - In human males, testes are extra-abdominal and lie in scrotal sacs.

(R) - Scrotum acts as a thermoregulator and keeps the temperature lower by 2°C for normal sperm production.

Answer the following type of question Assertion (A) and Reason (R).

(A) - Head of the sperm consists of acrosome and mitochondria.

(R) - Acrosome contains spiral rows of mitochondria.

At what stage of development are the gametes formed in newborn male and female?

Draw a labeled sketch of a spermatozoan.

Define gametogenesis.

Describe the structure of the human ovum with a neat labelled diagram.

Give a schematic representation of spermatogenesis and oogenesis in humans.

Identify the given image and label its parts marked as a, b, c and d

Expand the acronym.


Expand the acronym.


During spermatogenesis, spermatogonium grows in size to become ______.

Formation of ____________ is an indication of the termination of oogenesis.

Which of the following occurs during maturation phase of spermatogenesis?

Identify the longest period of menstrual cycle.

Select the correct sequence of oogenesis.

Find out the CORRECT sequence of spermatogenesis.

Select the pair of cells which does not divide further by mitosis.

The human male gamete is usually about ______ in length.

In human beings, the largest cell formed during Oogenesis is ______

Acrosome reaction in sperm is triggered by ______.

Besides activating the egg another role of a sperm is to carry ______ to egg.

Acrosome is a type of ______.

Which of the following contains the actual genetic part of a sperm?

At what stage of life is oogenesis initiated in a human female?

Which one is released from the ovary?

Aquatic animals in which fertilisation occurs in water are said to be

What does figure represent?

Observe the given figure and answer the questions that follow.

  1. Label A and B.
  2. Identify the process.
  3. What happens during the process and what is formed?

Sperms can be stored for several years in liquid nitrogen with a temperature of ______.

Fetal sex can be determined by examining cells from amniotic fluid looking for:

In the process of fertilization, this is true:

3-celled male gamete develops in:

If for a species 2n = 16, then during Ist prophase and IInd prophase of the meiotic division of a cell, how many tetrads and diads will be formed:

The region of the root tip whose cells undergo rapid elongation and enlargement and are responsible for the growth of the root in length is called the:

The number of chromosome groups at the equatorial plate in metaphase-I of meiosis in a plant with 2n = 50 shall be:

Growth hormone of pituitary is more effective in ______.

Follicular atresia is:

Capacitation refers to changes in the ______.

Germ cells present in the seminiferous tubules undergo ______

How many primary oocytes produce one oogonia?

Which type of cell division forms spermatids from the secondary spermatocytes?

What is spermatogenesis?

Draw a neat and labelled diagram of spermatogenesis.

Meiotic division of the secondary oocyte completed ______.

Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.

Answer the following:

How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?

Explain Oogenesis with diagram.

Distinguish between human sperm and ovum.


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