SCERT Maharashtra solutions for साइंस एण्ड टेक्नॉलोजी पार्ट २ [अंग्रेजी] कक्षा १० महाराष्ट्र राज्य बोर्ड chapter 3 - Life Processes in Living Organisms Part - 2 [Latest edition]

In humans, there are ____________ pairs of chromosomes.

Which of the following is not a type of asexual reproduction in multicellular organisms?

Find the odd one out:

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

____________ modern remedial technique is used if there is a problem in implantation of embryo in the uterus.

Implantation of the embryo occurs in ________.

In humans, sperm production occurs in the organ ______.

Pregnant mother supplies nourishment to her foetus through ___________.

___________ twins are formed from a single embryo.

Pollen grains are formed by _________ division in locules of anthers.

Asexual reproduction occurs by __________ cell division.

This method of asexual reproduction is seen in paramoecium.

In meiosis, the number of chromosomes becomes ___________.

Generally, every month, __________ ovum is released in the abdominal cavity alternately from each ovary.

__________ is present in unisexual flower.

Hormones related to male reproductive system.

Modern technologies in reproduction.

Hormones secreted by the ovary of the female reproductive system.

Amoeba : fission : : Hydra : ____________

Calyx : Sepals : : Corolla : ________________

Bisexual : Hibiscus : : Unisexual : ___________

Follicle stimulating hormone : Development of oocyte : : Luteinizing hormone : ____________

Accessory whorls : Calyx and corolla : : essential whorls : ______________

Pollen tube reaches the embryo sac via style.

Sometimes twins are genetically different.

Pollen grains from anther are transferred to the stigma.

Define.

Fragmentation

Define.

Vegetative propagation

Define.

Fertilization

Define.

Regeneration

Define.

Inflorescence

What is gamete formation?

Name the two types of twins.

Write any two Sexually transmitted diseases.

What determines whether the two organisms of a species will be exactly similar or not?

How are the sperms formed?

How is the semen produced?

Which are the components of pollination?

Which parts are converted into Seed and fruit respectively after fertilization?

What does germination mean?

Write the name of the type of reproduction in the following figure.

How can plants and animals save themselves from extinction?

Name the three types of asexual reproduction in unicellular organisms.

Write the functions of ovary

Write the functions of sepals

Write the functions of penis

Write the functions of Seminal vesicle

Give scientific reason.

Flower is a structural unit of sexual reproduction in plants. 

Give scientific reason.

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

Give scientific reason.

Fertilization in plants is called double fertilization.

Give scientific reason.

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

Give scientific reason.

The new individual produced by sexual reproduction always has the recombined genes of both the parents.

Identify the type of reproduction from the following explanation and draw a neat and labelled diagram.

1. The body of the parent organism breaks up into many fragments and each fragment starts to live as an independent new organism.
2. Give two examples of living organisms which follow this type of reproduction method.

Distinguish between self-pollination and cross-pollination.

Distinguish between sexual and asexual reproduction.

Explain the process of fertilization.

State names of organs in male reproductive system.

State names of organs in the female reproductive system.

Explain asexual reproduction in plants.

What would be the effect if meiosis did not occur in nature?

What is reproduction?

Explain the importance of the reproduction process.

Explain two main process in sexual reproduction.

Write a short note.

Budding in Hydra

Explain the following concept in short:

In-Vitro Fertilization (IVF)

Write a short note.

Reasons of infertility

Distinguish between the following.

Binary fission and Multiple fission

A married couple does not have children even after the necessary tests, so what are the solutions you would suggest?

Why is it necessary to maintain reproductive health? Which precautions one should follow to maintain reproductive health?

Observe the given diagram and explain the method of reproduction.

A piece of wet bread or bhakri kept in a humid place for 2-3 days, then

1. What will you observe?
2. State the scientific name of the living organism and write its characteristics.

Observe the given picture and answer the questions given below.

1. State the type of reproduction.
2. Identify the part of reproduction.
   Sweet potato - _____________
   Bryophyllum - _____________
   Potato - _____________

Observe the diagram and answer the following questions.

1. Label the indicated parts 1, 2 and 3 in the diagram.
2. Where the fertilization of ovum occurs?
3. Where does the embryo get implanted after fertilization?

1. Which type of reproduction is indicated in the following diagram?
2. Redraw the given type of reproduction in the correct sequence and explain it.
   

Complete the paragraph with the help of words given in the bracket.
(Luteinizing hormone, endometrium of uterus, follicle stimulating hormone, estrogen, progesterone, corpus luteum) 

Growth of follicles present in the ovary occurs under the effect of ____________. This follicle secretes estrogen. _____________ grows/regenerates under the effect of estrogen. Under the effect of ___________, fully grown up follicle bursts, ovulation occurs and _______________ is formed from remaining part of follicle. It secrets ____________ and __________. Under the effect of these hormones, glands of ____________ are activated and it becomes ready for implantation.

What is the menstrual cycle?

State the names of four hormones which control menstrual cycle.

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

Complete the table.

Draw a neat and labelled diagram.

Double fertilization in angiosperms

Draw a neat and labelled diagram.

Human male reproductive organs

Draw a neat and labelled diagram.

Spore formation

Sketch the labeled diagram:

Human female reproductive system

Write the answers to the following questions by observing the figure below.

1. What does the figure above show?
2. Which organs are involved in this process?
3. Which hormones are involved in this process?
4. After how many days do these changes happen again?
5. Explain your opinion about the statement that a woman's body is impure while the above process is going on.

Explain the sexual reproduction process in plants with a diagram.

Observe the figure below. Write functions of the labelled parts.

Read the following paragraph and write the answers to the questions based on it.

Reproduction is an important process for the survival of an organism. Asexual reproduction occurs in different ways in plants. E.g. Vegetative propagation, fragmentation, budding, spore formation etc. Gametes are formed for sexual reproduction. In the animal kingdom, various methods like budding, binary fission, and parthenogenesis are used. There is no difference between males and females in the animals in which these methods are observed. The method of regeneration also creates new organisms. But regeneration is not the real method of reproduction. Regeneration is the process of healing wounds, creating new organs. This ability has completely disappeared in the developed animals. Modern research is being done on the method of sexual reproduction, e.g. Cloning. So, in the future women will be able to create their own offspring without a father.

1. How do living organisms maintain their own species continuity?
2. What are the methods of asexual reproduction in animals?
3. Why is it said that regeneration is not the real method of reproduction?
4. What are the different methods of reproduction in plants?
5. What modern breeding methods are being researched in developed animals?

‘Surrogacy, In Vitro Fertilization (IVF), Sperm Bank/Semen Bank etc. modern technology will be useful to humans.’ support this statement.

Write the answers to the questions by observing the figure.

1. What does the above figure show?
2. Write the names of parts A, B, C, D.
3. Write the function of the part 'D'.
4. How is semen formed?

1. What process does the next figure show?
   
2. Describe in short that process.
3. Who can benefit from this process?