Chapter 2: Lost Spring
Lost Spring NCERT Text Book Questions and Answers Notice these expressions in the text. Infer their meaning from the context.(i) looking for(ii) slog their daylight hours(iii) roof over his head(iv) imposed the baggage on the child(v) perpetual…
Class 12 English Flamingo Chapter 1: The Last Lesson
The Last Lesson NCERT Text Book Questions and Answers Notice these expressions in the text. Infer their meaning from the context(i) in great dread of(ii) counted on(iii) thumbed at the edges(iv) in unison(v) a great hustle(vi) reproach…
Chapter 3: Deep Water
Deep Water NCERT Text Book Questions and Answers Notice these words and expressions in the text. Infer their meaning from the context.(i) treacherous(ii) subdued my pride(iii) misadventure(iv) bob to the surface like a cork(v) flailed at the…
Chapter 4: The Rattrap
The Rattrap NCERT Text Book Questions and Answers Notice these expressions in the text. Infer their meaning from the context,(i) keep body and soul together.(ii) hunger gleamed in his eyes(iii) plods along the road(iv) unwonted joy(v) impenetrable…
Chapter 6: Molecular Basis of Inheritance
1. Group the following as nitrogenous bases and nucleosides: Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine.Ans: Nitrogenous Bases – Adenine, Uracil and Cytosine, Thymine; Nucleosides – Cytidine, guanosine. 2. If a double stranded DNA has 20 per cent…
Chapter 5: Principles of Inheritance and Variation
1.Mention the advantages of selecting pea plant for experiment by MendelAns: Mendel select garden pea (Pisum Sativum) for the following reasons.(i) It is an annual plant with short life span and gives results within 3 months.(ii) The plant…
Chapter 4: Reproductive Health
1. What do you think is the significance of reproductive health in a society?Ans: Reproductive health in a society is significant because the people are aware of(i) birth control methods and advantages of small family,(ii) sexually transmitted diseases…
Chapter 3: Biology Human Reproduction
1. Fill in the blanks:(a)Humans reproduce————— (asexually/sexually).(b)Humans are————— (oviparous, viviparous,ovoviviparous).(c)Fertilization is————— in humans (external/internal).(d)Male and female gametes are—————(diploid/haploid).(e)Zygote is————— (diploid/haploid).(f)The process of release of ovum from a mature follicle is called————— .(g)Ovulation is induced by a hormone…
Chapter 2: Sexual Reproduction in Flowering Plants
1. Name the parts of anangiosperm flower in which development of male and female gametophytes take place.Ans: Development of male gametophyte (micro- gametogenesis) occurs in pollen sac of anther up to 2 – celled stage. The female gametophyte…
Chapter 1: Reproduction in Organisms
1. Why is reproduction essential for organisms?Ans: Reproduction is the ability of living organisms to produce a young one similar to itself. It ensures continuity of a species generation after generation. Reproduction introduces variation in the organisms. Useful variations…
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