Lakhmir Singh solutions for Biology [English] Class 10 ICSE chapter 13 - Reproductive System [Latest edition]

Fertilisation results immediately in the formation of ______.

Characters that are transmitted from parents to offspring during sexual reproduction show:

The offspring formed as a result of asexual reproduction exhibit no variations because ______.

The ______ and ______ are two types of reproduction found in living organisms.

The offsprings which are exact carbon copy of the parent, so they are called ______.

There are ______ types of asexual reproduction.

One of the following is not a part of the human male reproductive system. This is:

The correct sequence of organs in the male reproductive system for transport of sperms is

In human males, the testes lie in the scrotum outside the body because it helps in the ______.

______ is a pouch-like structure in the male reproductive system.

______ is a thread-like structure in the male reproductive system.

Vas deferens is also called ______.

______ is a copulating organ.

True or False.

A muscular passage that connects uterus with the outside end of the body is called vagina.

True or False.

Two eggs are released from each ovary every month.

True or False.

Uterus is the hollow area where the embryo develops.

Fertilisation occurs in the ______ junction of fallopian tube.

The follicle contains matured egg is called ______.

Complete the following sentences with appropriate word:

The process of releasing an egg from the ovary is called _________.

______ are modified sweat glands that secretes milk.

______ consists of mons pubis, labia majora and labia minora.

How do miscarriages occur during pregnancies?

What do they observe to know that a person is pregnant in pregnancy test?

Sperm consists of ______, ______, ______ and ______.

The lysosome structure present in the head of sperm is ______.

The part of the sperm that contains the mitochondria is ______.

The size of ovum is about ______, ______ in shape and almost free of ______.

Ovum is covered by ______ and ______.

The cause of shedding of uterine lining is called ______.

The phase of menstrual cycle in which follicle develops.

The day of menstrual cycle when ovulation occurs is on ______ day.

The duration of menstrual cycle is ______.

When male and female gamete fuses with each other is called ______.

The blastocyst embedded in the lining of the uterus is called ______.

The blastomeres form a compact ball of cells called ______.

______ is a temporary organ formed in the uterus during pregnancy and contains two sets of villi.

The layer that functions as a shock absorber to the embryo.

A cord that acts as a connection between mother and child.

Layer of embryo that gets degenerated in human embryo.

The part that acts as an ultrafilter for the embryo.

______ helps in parturition.

______ helps to relax the uterine muscles.

______ enlarges the breast and nipples for breast feeding.

______ helps in the ejection of milk from mammary glands.

True or False.

Gestation period in humans is of 340 days.

True or False.

Placenta produces three hormones.

True or False.

There is only one set of villi connecting baby to the mother.

True or False.

Fraternal twins develop from the same egg.

True or False.

There are three main accessory glands in male reproductive system.

True or False.

Vasa deferens is a continuation of cauda epididymis.

True or False.

Scrotum acts as a thermoregulatory.

True or False.

Donation of eggs is an easy process.

True or False.

Fertilisation occurs in the uterus.

______ ejects spermatozoa into the urethra.

Penis has three spongy ______ tissue.

The number of chromosomes in a sperm is ______.

______ of the ovary secretes progesterone.

______ is the expulsion of foetus from the mother's womb.

Match the following:

Give One Word Answer:

Contains mitochondria in the sperm.

Give One Word Answer:

Almond-shaped structure in the female reproductive system.

Give One Word Answer:

A hormone that helps the process of parturition.

Give One Word Answer:

A part of vulva that is same as male penis.

Give One Word Answer:

The production of sperms takes place in this part of testes.

Give One Word Answer:

The accessory gland in human males whose secretion neutralises the acid in the vagina.

Name the following: 

The structure which connects the placenta and the foetus.

Which part of the foetus is formed after the 3rd month of pregnancy?

Which layer takes part in the formation of the placenta?

Gestation period is of how many days?

Hormone produced by testes is ______.

When male and female gamete fuses with each other, it is called ______.

How many stages are there in parturition?

The duration of menstrual cycle is ______.

Which part of the sperm provides energy and help in its movement?

Which part of the female reproductive system is a fibromuscular tube starting from the uterus and ends on outside the body?

The outer covering of the ovum is known as ______.

The fusion of the sperm and ovum is termed as ______.

In a human female, ovum consists of ______.

Choose the correct answer from the four options given below : 
 On which day of the menstrual cycle does ovulation take place ?

Given below are certain groups of terms. In each group the first pair indicates a relationship between the two terms. Rewrite and complete the second pair on a similar basis.

Ureter: Implantation :: Fallopian tube: .............

Correct and rewrite the statements by changing the biological term that is underlined for the statement:

The protective sac which develops around the developing embryo is called the Pericardium.

What is the role of the inguinal canal?

Write the methods of asexual reproduction.

Write the reproductive parts of the female.

Write the reproductive parts of the male.

State the main function of the Sperm duct.

Explain the function of the following structure in the human male reproductive system.

Scrotum

State the function of umbilical cord.

State the main function of the corpus luteum.

Why can fraternal twins be of different sexes?

Why are testes in human males located outside the abdominal cavity in the scrotum?

What is the importance of breasts in females?

With the help of labelled diagram describe the structure of human sperm.

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

Define the following:

Oogenesis

Define.

Fertilization

Define the following term:

Reproduction

Define the following:    
Parturition 

Write two major functions of testis.

Differentiate between the Following:

Fertilisation and Implantation

Differentiate between the Following:

Male and Female reproductive system

Differentiate between the Following:

Ovulatory and Menstrual phase

Differentiate between the following pair: 

Menarche and menopause 

Distinguish between the following pair of terms:

Egg and sperm.

Distinguish between asexual and sexual reproduction.

Differentiate between Identical twins and fraternal twins. 

Write about the accessory glands of the male reproductive system.

Describe the menstrual cycle. Why does it occur?

Describe the human male reproductive system.

Describe the female reproductive systems in humans.

Mention any two functions of the human placenta.

Write the different stages of foetus development.

Describe how the zygote gets fixed to the uterus wall after fertilisation.

Compare the secondary sex characteristics of male and female.

Write about the role of placenta in the development of embryo.

Give details about the gestation period in humans.

Explain the source and functions of sex hormones.

The diagram given below is that of a developing human foetus. Study the diagram and then answer the questions that follow:

1. Label the parts numbered 1 to 3 in the diagram.
2. Mention any two functions of the part labelled 2 in the diagram.
3. Explain the significance of the part numbered 3 in the diagram.
4. Define the term ‘Gestation’. What is the normal gestational period of the developing human embryo?
5. Mention the sex chromosomes in a male and female embryo.

The diagram given below represents a system in the human body. Study the diagram and answer the following questions:

1. Identify the system.
2. Label the parts marked 5 and 6.
3. Name the two hormones secreted by 1.
4. Mention the number and the name of the part involved in fertilization and implantation from the above diagram.
5. Mention the surgical methods of contraception in:
   1. Human males.
   2. Human females.

Santosh was one day glancing through some magazines when he saw an article on 'Test tube babies. Wanting to know more about this, he asked his aunt, an eminent surgeon. To clarify his doubts and to develop his scientific temper, she took him to her clinic. On reaching the fertility department, he was briefed by doctors who were eager to explain to this young boy. He was taken to various labs and work rooms, and he also had a glimpse at a newborn test tube baby. He was impressed by the advancement and use of latest technologies in India. On returning home, he decided to learn more about how medical science has progressed over the years. Few topics on which he explored are:

1. Doctors who worked on test tube babies in India. Who is the first Indian test tube baby? When she was born, her name and where she lives.
2. First test tube baby in the world.
3. Other technologies used to develop embryo artificially. Success rate of each method.
4. Difference between Siamese, identical and conjoined twins. Number of conjoined cases in India and their success rate.
5. What is meant by surrogate mother? Why is it given importance in recent times?