MANDALSIR

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1.Study of Transmission oh heat.Investigate parameters that can affect the transmission of heat. 2.Explore the habitation,plantation etc. in a pond /lake in your vicinity. 3.Servey water resources in your locality.How much water do we consumes everyday?How much water is wasted due to leakage of taps in our homes. 4.Create a weather chart. 5.I care my tree!How?Study of its morphology,growth, health,what does it need?Does it respond to affection?When will it die? 6.Energy management. 7.Water management. 8.Waste management in your locality/city/town. 9.Birds of my town.

KENDRIYA VIDYALAYA ,BARRACKPORE (AFS) STD-VII,SUB-SCIENCE, CHAPTER EXCRETION Name _________________________________                                   Period _______ 1.Define excretion? 2.Write the difference between excretion  and egestion on the basis of the  substance given out and organ involved. 3. Write the names of different organs and substances in excretion in human being. 4. How and where these waste materials are produced in the body. 5. Why these waste materials should be removed from the body. 6. Write the names of the organs of urinary/excretory organs. 7. Cell                     metabolism             waste          Diffusion              Blood capillary             Artery                                                                      Useful substances                                                       nephrone         capillary                                                                                       

  Chapter-12 BIOTECHNOLOGY & ITS APPLICATION Biotechnology is making Genetically modified organisms-microbes, plants, animals for industrial production of Bio-Pharmaceuticals and other useful products.  Applications – i) Diagnostic & therapeutic ii) Genetically modified crops iii) Waste treatment iv) Energy production v) Food processing vi) Bioremediation Research areas-i) i) Providing the best catalyst in the form of improved organism usually a microbe or pure enzyme. (ii) Creating optimal conditions through engineering for a catalyst to act, and (iii) Downstream processing technologies to purify the protein/organic compound. Three options that can be thought for increasing food production (i) agro-chemical based agriculture ii) organic agriculture; and (iii) genetically engineered crop-based agriculture. Application in agriculture: Genetically modified organisms (GMO)-Plants, bacteria, fungi, animals. whose genes are altered by manipulation. Transgenic crops(GMO) -

Porifera: They have pores(ostia) ,Central body cavity spongocoel ,Water going out through osculum Some live in fresh water or the ocean -Non-motile, -Asymmetrical -Diploblastic containing 2 germ layers: endoderm and ectoderm -Have collar cells (choanocytes) -Reproduce sexually and asexually ,hermaphrodite -Possess spicule - make up the skeleton Multicellular ,Cell level organization ,Digestion intracellular : Fertilization-internal ,development-indirect through larval stage larva distinct from adult     Coelenterata (Cnidaria) marine sessile or free swimming, diploblastic     Radial symmetry –Diploblastic middle layer mesoglea *Possess stinging cells (nematocysts)-anchorage defence capture Possess alternations of generations---> sexual ---> asexual ---> sexual ---> asexual---> & continues. Occurs in all classes except in class Anthozoa Asexual= attached -->polyp (non-motile)    -Sexual= free swimming ---> medusa -Extracellular digestion Tis

KENDRIYA VIDYALAYA AFS BARRACKPORE SESSION 2015-16 MONTHLY TEST FOR APRIL STD- XII   , SUBJECT –BIOLOGY ,TOTAL MARKS-25    TIME-45MINUTES 1.Foetal   ejection reflex in human female is induced by                                                                       a..Differentiation of mammary glands             b. Pressure exerted by amniotic fluid                                                  c. Release of oxytocin from pituitary               d. Fully developed foetus and placenta 2.Which one of the following statement correct?                                                                                                                                                    a. Spermatogenesis is the formation of sperm cells.     b. Spermatogenesis occurs in the Seminiferous tubules .c. Follicle-stimulating hormone (FSh) indirectly stimulates spermatogenesis. d. All of these are correct 3. Choose the incorrect statement from the following: