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Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Class 10 MCQ


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20 Questions MCQ Test Science Class 10 - Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce?

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Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 1

In a bisexual flower, the parts that produce male and female gametes (germcells) are

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 1

Anther produces pollen grain while ovary produces egg.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 2

In the list of organisms given below, those that reproduce by the asexual method are
(i) banana
(ii) dog
(iii) yeast
(iv) Amoeba

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 2

Asexual reproduction is the mode of reproduction in single parent produces offsprings. Amoeba reproduces asexually by binary fission. Asexual reproduction occurs in yeast by means of budding and in banana asexual reproduction occur by means of vegetative propagation from the stem. Thus, the correct answer is option B.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 3

Characters transmitted from parents to offspring are present in

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 3

DNA is the heridity material and genes which are located on chromosomes are made up of DNA.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 4

A pair of duct arising from testis, which carry sperms are

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 4
Answer:
The pair of ducts that arise from the testis and carry sperm are called vas deferens. Here is a detailed explanation:
Definition:
- The vas deferens, also known as the ductus deferens, is a thin muscular tube that carries sperm from the epididymis (where sperm matures) to the ejaculatory ducts.
- It is a part of the male reproductive system and is responsible for transporting sperm during ejaculation.
Function:
- The primary function of the vas deferens is to propel sperm from the epididymis to the ejaculatory ducts.
- During sexual arousal, the vas deferens contracts, pushing the sperm towards the urethra for ejaculation.
Anatomy:
- The vas deferens is a long, coiled tube that starts from the epididymis, located in the scrotum, and travels through the spermatic cord.
- It then ascends through the inguinal canal and enters the pelvic cavity.
- In the pelvic cavity, the vas deferens joins with the seminal vesicle to form the ejaculatory duct.
Importance:
- The vas deferens plays a crucial role in male fertility as it carries mature sperm from the testes to the urethra.
- It is an essential component of the male reproductive system and is necessary for natural conception.
In conclusion, the correct answer is B: vas deferens. The vas deferens carries sperm from the testes to the ejaculatory ducts and is an important part of the male reproductive system.
Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 5

Traits transmitted from parents to offspring during reproduction show

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 5

Offspring exhibit similarities as well as variation from parents.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 6

Where does fertilisation take place?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 6
Where does fertilisation take place?

  • Fertilisation: The process in which a sperm cell fuses with an egg cell to form a zygote, which eventually develops into an embryo.

  • Location: Fertilisation takes place in the Fallopian tube of the female reproductive system.


Explanation:

  • The female reproductive system consists of several organs, including the uterus, vagina, fallopian tubes, and cervix.

  • During sexual intercourse, sperm is deposited in the vagina.

  • The sperm then travels through the cervix and enters the uterus.

  • From the uterus, the sperm continues its journey through the Fallopian tube.

  • If an egg is present in the Fallopian tube, fertilisation can occur.

  • The sperm penetrates the egg, and their genetic material combines to form a zygote.

  • The zygote then implants itself in the uterus, where it develops into an embryo.


Conclusion:

  • Fertilisation takes place in the Fallopian tube of the female reproductive system.

  • It is the process of sperm fusing with an egg to form a zygote.

  • The zygote then develops into an embryo and implants itself in the uterus.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 7

The ability of a cell to divide into several cells during reproduction in Plasmodium is called

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 7

Reduction division occurs during meiosis. Budding is seen in yeast and hydra while amoeba reproduces asexually by binary fission.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 8

What marks the beginning of the reproductive life of a woman?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 8
What marks the beginning of the reproductive life of a woman?
The correct answer is B: Menarche.
Explanation:
Menarche is the term used to describe the first occurrence of menstruation in girls. It marks the beginning of the reproductive life of a woman. Here is a detailed explanation:
Menarche:
- Menarche refers to the onset of menstruation in girls, typically occurring between the ages of 10 and 15, although it can vary.
- It is a significant milestone in a girl's life and indicates that her reproductive system is maturing.
- Menarche is accompanied by hormonal changes as the body prepares for potential pregnancy.
- It signifies that the ovaries are starting to release eggs and the uterus is developing a lining to support a possible pregnancy.
Other Options:
- Menopause (Option A) is the end of a woman's reproductive period and refers to the cessation of menstrual periods.
- Fertilisation (Option C) is the process by which a sperm cell combines with an egg cell to form a zygote, which can develop into an embryo.
- Ovulation (Option D) is the release of a mature egg from the ovary, which typically occurs midway through the menstrual cycle.
Overall, menarche is the correct answer as it marks the beginning of a woman's reproductive life by initiating the menstrual cycle.
Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 9

A feature of reproduction that is common to Malarial parasite, Spirogyra and Yeast is that

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 9

In all of them asexual reproduction takes place e.g., in spirogyra fragmentation, malarial parasite multiple fission and in yeast by budding.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 10

When the foetus is growing inside the uterus it needs nutrients. Which part provides these nutrients?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 10
Placenta is the part that provides nutrients to the growing fetus inside the uterus.
Explanation:
The placenta is an organ that develops during pregnancy and is attached to the inner wall of the uterus. It acts as a connection between the mother and the fetus, providing essential nutrients and oxygen to support the growth and development of the fetus.
Key Points:
- The placenta is responsible for exchanging nutrients and waste products between the mother's blood and the fetus's blood.
- It allows the transfer of oxygen, glucose, amino acids, vitamins, and minerals from the mother's bloodstream to the fetus.
- The placenta also filters out waste products such as carbon dioxide and urea from the fetus's blood, which are then eliminated by the mother's body.
- It produces hormones that help maintain the pregnancy, such as human chorionic gonadotropin (hCG), progesterone, and estrogen.
- The placenta also acts as a protective barrier, preventing harmful substances from reaching the fetus.
- It continues to grow and develop throughout pregnancy, ensuring a constant supply of nutrients and oxygen to support the fetus's growth.
In conclusion, the placenta plays a crucial role in providing the necessary nutrients for the growing fetus inside the uterus.
Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 11

The number of chromosomes in parents and offsprings of a particular species remains constant due to

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 11

Gametes have half the number of chromosome (n) as they are formed by meiosis. After syngamy the (2n) diploidy is restored in zygote.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 12

In case the ova does not fertilise, which of the following events will take place?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 12
Explanation:
If the ova (eggs) do not fertilize, the following events will take place:
1. Menstruation: Menstruation refers to the shedding of the uterine lining that occurs when fertilization does not occur. The unfertilized egg, along with the thickened uterine lining, is expelled from the body through the vagina during menstruation.

2. Pregnancy: Since fertilization did not occur, there will be no pregnancy. Pregnancy occurs when a sperm fertilizes an egg, resulting in the implantation and development of an embryo in the uterus.
3. Implantation: Implantation is the process by which a fertilized egg attaches itself to the lining of the uterus. In the absence of fertilization, there will be no implantation.
4. Ovulation: Ovulation is the release of a mature egg from the ovary. If fertilization does not occur, ovulation will still take place in the next menstrual cycle, as it is a regular process in the female reproductive system.
Therefore, the correct answer is A: Menstruation.
Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 13

Length of pollen tube depends on the distance between

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 13

Pollen tube passes from surface of stigma to the lowest part of pistil the ovary where ovules are located.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 14

 When a sperm is deposited into the vagina which route does it travel?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 14
Route of Sperm Travel:
The correct route that a sperm takes after being deposited into the vagina is as follows:
Vagina → Cervix → Uterus → Oviduct
Here is a detailed explanation of each step:
1. Vagina: The sperm is initially deposited into the vagina during sexual intercourse.
2. Cervix: The sperm then travels through the cervix, which is the narrow passage that connects the vagina to the uterus. The cervix contains a small opening called the cervical os, which allows the sperm to enter the uterus.
3. Uterus: From the cervix, the sperm enters the uterus, which is a hollow, muscular organ located in the pelvis. The uterus is where a fertilized egg implants and develops into a fetus during pregnancy. The sperm moves through the uterus towards the oviduct.
4. Oviduct: Also known as the fallopian tube or uterine tube, the oviduct is a pair of long, slender tubes that extend from the uterus on each side. The sperm travels through the oviduct, where it may encounter and fertilize an egg if one is present. The oviduct is the site of fertilization and the beginning of the journey for the fertilized egg towards the uterus.
It is important to note that not all sperm reach the oviduct, as the journey is challenging and only a small number of sperm survive and reach the egg. Additionally, the timing of intercourse in relation to ovulation plays a crucial role in the chances of fertilization.
Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 15

Which of the following statements are true for flowers ?
(i) They are the sexual reproductive organs,
(ii) They are produced in all groups of plants.
(iii) Flowers are always bisexual.
(iv) After fertilisation they give rise to fruits

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 15

Flowers are not found in lower plants. Plant like papaya have unisexual flowers. 

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 16

The ability to reproduce is lost in a female after

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 16
Answer:
Explanation:
The ability to reproduce is lost in a female after menopause. Here's a detailed explanation:
Menopause:
- Menopause is a natural biological process that occurs in women. It is defined as the permanent cessation of menstruation and the end of the reproductive phase of a woman's life.
- Menopause usually occurs between the ages of 45 and 55, with the average age being around 51.
- During menopause, the ovaries stop producing eggs and the production of estrogen and progesterone decreases significantly.
Loss of Reproductive Ability:
- Menopause marks the end of a woman's reproductive years. After menopause, a woman can no longer become pregnant or give birth naturally.
- The loss of reproductive ability is due to the absence of eggs in the ovaries and the hormonal changes that occur during menopause.
Other Options:
- Fertilization: Fertilization refers to the fusion of a sperm and an egg to form a zygote. It is the initial step in the process of reproduction and does not lead to the loss of reproductive ability in females.
- Menstruation: Menstruation is the shedding of the uterine lining that occurs in women of reproductive age who are not pregnant. It is a monthly process and does not lead to the loss of reproductive ability.
- Gamete Formation: Gamete formation refers to the production of eggs (ova) and sperm. While the ability to produce gametes decreases with age, it does not result in the complete loss of reproductive ability.
In conclusion, the ability to reproduce is lost in a female after menopause, which is the permanent cessation of menstruation and the end of the reproductive phase of a woman's life.
Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 17

Which of the following statements is not correct about reproduction ?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 17

Some animals like hydra reproduce by asexual means. Reproduction is not necessary to maintain life.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 18

Which of the following is a primary sex organ in a mammal?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 18

The organs that produce the gametes are referred to as the primary sex organs. These are the gonalds, the testicles in the male and the ovaries in the female.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 19

Leishmania reproduce asexually by

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 19

Leishmania reproduces by binary fission.

Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 20

The fertilisation of human egg by the sperm takes place in

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: How Do Organisms Reproduce? - Question 20
The fertilisation of human egg by the sperm takes place in the oviduct.
- The oviduct, also known as the fallopian tube, is a part of the female reproductive system.
- It is a tube-like structure that connects the ovaries to the uterus.
- The oviduct is the site where fertilization occurs in humans.
- After ovulation, the egg is released from the ovary into the oviduct.
- If sperm is present in the oviduct during this time, it can fertilize the egg.
- Sperm can reach the oviduct by traveling through the vagina and cervix.
- The oviduct provides an ideal environment for fertilization to occur.
- The inner lining of the oviduct is lined with cilia and secretory cells that help transport the egg and sperm.
- Once fertilization occurs, the fertilized egg, now called a zygote, starts to divide and travel towards the uterus.
- It takes several days for the zygote to reach the uterus, where it implants and develops into an embryo.
In summary, the fertilization of the human egg by the sperm takes place in the oviduct, specifically in the ampulla region of the fallopian tube.
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