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 4: Animal Kingdom
NCRT TEXTBOOK QUESTIONS SOLVED 1.What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?soln. The common fundamental features used for classifying animals include body symmetry, arrangement of…
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 3: Plant Kingdom
NCERT TEXTBOOK QUESTIONS SOLVED 1.What is the basis of classification of algae?soln. Fritsch (1935), has classified algae considering phylogeny, affinities and inter-relationships of various forms. He classified algae mainly on the basis of the characters like structure of…
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…
Class 11 Biology Chapter 1: The Living World
NCERT TEXTBOOK QUESTIONS SOLVED 1. Why are living organisms classified?Soln. Living organisms are classified because of the following reasons:(i) Easy identification.(ii)Study of organisms of other places.(iii)Study of fossils(iv)Grouping helps in study of all types of organisms while it…
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…
Chapter 2: Biological Classification
NCRT TEXT BOOK QUESTIONS SOLVED 1.Discuss how classification systems have undergone several changes over a period of time?Soln. Biological classification is the scientific procedure of arranging organisms in a hierarchical series of groups and sub-groups on the basis…
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