Class 10th biology vvi subjective questions: क्लास 10th और 12th सब्जेक्टिव क्वेश्चन यहां से देखें

Class 10th biology vvi subjective questions

1 Write a short note on placenta?

ans::Placenta is the intimate association between Foetus and maternal uterine endometrium through which exchange of material takes place. It is formed by Foetal chorionic villi and uterine endometrium of mother. In mammals placenta is of different types-

(a) Yolk sac type-It is formed by yolk sac and chorion, e.g. Kan-

garoo. (b) Chorio-allantoic type-It is formed by Allantois & Chorion, e.g. most of mammals.

(c) Chorionic type-It is formed by chorion, e.g. Human beings.

Role of Placenta in Mammals-

It helps in attachment of Foetus with mother uterus during pregnancy.

It helps in exchange of materials along with O, and CO,. It also works as endocrine organ as if secrets Estrogen, Progesterone,

2G, hcp alongwith some other hormones

Class 10th biology vvi long answer questions

1.What do you understand by parturition? Explain.

Ans.-The average duration of human pregnancy is about 9 months which is called the gestation period. Vigorous contraction of the uterus at the end of pregnancy causes expulsion/delivery of the foetus. This process of delivery of the foetus is called parturition. Parturition is in duced by a complex neuroendocrine mechanism. The signals for parturition originate from the fully developed foetus and the placenta which induce mild uterine contractions called Foetal Ejection Reflex. This triggers release of oxytocinfrom the maternal pituitary. Oxytocin acts on the uterine muscle and causes stronger uterine contractions, which in turn stimulates further secretion of oxytocin. The stimulatory reflex between the uterine contraction and oxytocin secretion continues resulting in stronger and stronger contractions. Ans This leads to expulsion of the baby out of the uterus through the birth canal ferred so called parturition. Soon after the infant is delivered, the placenta is also insid expelled out of the uterus.

Mammary glands of the female undergo differentiation during pregnancy and starts producing milk towards the end of pregnancy by the process called Lactation. This helps the mother in feeding the new-born.

Read more: science class 10th chapter 2 

short answer type questions

. What is a Farce?

Ans. Farce is a comedy that seeks to entertain an audience through situations that are highly exaggerated, extravagant, ridiculous, absurd and improbable.

2. What were the two concerns of the early Indian poets writing in

English 7

Ans.-The two major concerns of the early Indian poets writing in English were: The first major problem was that there has to be an Indianized version of the English language for the poets to express their true feelings about the Indian society. Secondly the Indian poets were not properly anglicized with the English language which made it difficult for them to express themselves properly.

Class 10th biology
Class 10th biology

3. Which speech came to be known as ‘Received Pronunciation’?

Ans-Received Pronunciation (RP) is the proper term to describe the regionally neutral accent used by many middle class speakers in the UK, particularly in England. It is widely used as a reference point in dictionaries and as a model for teaching English as a foreign language.

long answer type questions

1. Write a note on the future of English.

ns. To see Q.No.6 Page No. 19.

2. Write a note on Old English.

ns.-The Old English period is from AD 449 to AD 1066. The period was e childhood of English as a language. At that time English was purely a mixture of different dialects. Old English was dialectical. Its words were written and pronounced differently. It was mostly imitative in nature. It has no grammar of its own. Many of old english words and structures have gone out of use today. The old English period failed to produce literature of much significance as court patronage was lacking at the time and the age come to be known as the Dark Age.

3. What are the problems in learning English as a second language?

Ans.-Learning a language is not an easy task for many people. English as a second language comes with many challenges, especially in terms of pronunciation, context and cultural norm. All languages have their idiosyncrasies and learning English may be daunting to many learners for many reasons. Due to language barriers and the unfamiliarity of cultural an English language learner can find it difficult to make time for education and language learning. ESL learners are often faced with culture shock,which can impede their education and progress.


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