BIOLOGY:- 1) What is the fragmentation in organisms ? Name a multicellular organisms which reproduces by the method? 2) What are the various steps in food chain? 3) What makes the Earth's atmosphere a heterogeneous mixture? 4) Why DNA copying an essential part of the the process of reproduction? 5) Give an example to illustrate the indiscriminate use of pesticides may result in the degradation of the environment? 6) Define Foetus? 7) List any four modes of spreading AIDS? 8) Describe any three ways in which individuals with a particular trait may increase in population? 9) State the evidence we have for the origin of life inanimate matters? 10) List any two methods by which solid wastes of urban areas are disposed off? 11) Which gland contribute fluid to the semen ? 12) State two advantages of semen offers to the sperms? 13) Describe the role of fallopian tube in the Female Reproductive System? 14) Name one organ each in the female and male reproductive system which plays a role of endocrine glands along with production of germ cells .Name one of the hormones secreted by each of them? 15) State two advantages to the development of the embryo in mother's womb? 16) Where does fertilization occur in care of human female and name the place where fertilized egg gets implanted?
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1)when water and nutrients are available spirogyra divides and multiply rapidly.Each filament gets divided into several fragments.This is called fragmentation.
13)In fallopian tube fertilization takes place.16) Egg gets implanted in form of balls of cells called blatocyst in walls of uterus where it gets nutrients and oxygen from mother blood supplied by Umbilical cord.
13)In fallopian tube fertilization takes place.16) Egg gets implanted in form of balls of cells called blatocyst in walls of uterus where it gets nutrients and oxygen from mother blood supplied by Umbilical cord.
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Fragmentation refers to asexual reproduction in which an organism breaks into fragments and each fragment later develop into new individual. Eg. Spirogyra
Dna being the genetic material is very essential.
Aids can spread through: blood transfusion, mother to baby or through use of infected syringes.
Prostate gland and seminal vesicle help to nourish the sperms.
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