Sunday, 7 July 2019

10th Biology Chapter 5 Reproduction Notes

10th Biology Chapter 5 Reproduction Notes

10th Biology Chapter 5 Reproduction Notes

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Q. No.1 Define reproduction
 REPRODUCTION
 The production of individuals of the same species i. e. the next generation of species is called reproduction
 Q. No. 2 Is reproduction essential for life processes?
 REPRODUCTION FOR LIFE PROCESSES
 Reproduction is not essential for life processes, it is one of the fundamental characteristics of the living things
 Q. No. 3 What is the difference of survival between individual and species?
 An individual can live without reproduction, but a species can not survive without reproduction
 Q. No. 4 What is the importance of reproduction?
 IMPORTANCE OF REPRODUCTION
 Reproduction is essential for the continuation of species It ensures that the genetic material of one generation is transmitted to the next 
Q. No. 5 How advantageous characteristics are transmitted to the next generation?
Q. No.8 Why mosses and ferns require water for their sexual reproduction?
 REQUIREMENT OF WATER FOR REPRODUCTION
 In mosses and ferns sperms are motile and can swim to egg cells. Therefore, these plants require water in the form of dew or rain for sexual reproduction.
Q. No. 9 Why the method of reproduction is also called micro-propagation?
 MICRO-PROPAGATION
 The method of reproduction is also called micro-propagation sine it uses only a small part of plant.
 Q. No. 10 flower?
 WHORL OF FLOWER
 All the structures present at one are collectively called the whorl of the flower.
 Q. No. 11 What is the contribution of Theophrastus?
 CONTRIBUTION OF THEOPHRASTUS
 He was the successor of Aristotle, He was great philosopher.
 He laid a solid foundation of botany including the morphology and functions of the flowers.
 He recognized the male and female sex parts of the flowers and described the pollination and fertilization in flowers.
 Q. No. 12 What is parthenocarpy?
 PARTHENOCARPY
 In some plants, ovaries develop into fruit without the fertilization inside their ovules. This process is known as parthenocarpy and it results in seedless fruits.
 Examples:
 Bananas
 Seedless varieties of grapes
 Q. No. 13 What is the reason of success of seed plants?
 SUCCESS OF SEED PLANTS
 The evolution of seed has been proved as an important step in the success and spread of flowering plants, as compared to the seedless plants like mosses and ferns.
 Q. No. 14 What is dormancy?
 DORMANCY
 Most seeds go through period, during which there is no Growth This period called the dormancy of the seed. Dormant seeds are ripe seeds but do not germinate Under favourable conditions, the seeds break dormancy and begin to germinate 
Q.No. 15 What is the future of ovule and ovary after fertilization in flower?FUTURE OF OVULE AND OVARY After fertilization, the ovule develops into seed while ovary develops into fruit Q.No. 16 Why do rabbits ingest their faeces?
 REINGESTION OF FAECES
 Rabbits ingest their own pallet-like faeces to digest their food further and extract sufficient nutrients.
 Q. No. 17 What do you know about The United Nations Population Fund?
 THE UNITED NATIONS POPULATION FUND
 UNFPA began operations in 1969. It is the largest international organization funding for population and health programmes. The UNFPA works in over 140 countries, for awareness about the consequences of overpopulation.
 Q. No. 18 What is the incidence of HIV in Pakistan?
 INCIDENCE OF HIV IN PAKISTAN
 According to the United Nations Programme on AIDS in. UNAIDS estimates, some 70.000 to 80.000 persons, or 0.1 percent of the adult population in Pakistan, are infected with HIV.
 Q. No. 19 What is the number of drug addicts in Pakistan?
 DRUG ADDICTS IN PAKISTAN
 The number of drug addicts in Pakistan is currently estimated to be about 500,000 of whom 60,000 inject drugs.

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