Class name Subject Book title Chapter number Content Created at
Class X Science Science 7 Observe the surface of the slice with a magnifying glass. ■ Record your observations for a week. Compare and contrast the ways in which yeast grows...
Class X Science Science 7 slide. ■ Put a drop of glycerine on these filaments and cover it with a coverslip. ■ Observe the slide under a microscope. ■ Can you identify diffe...
Class X Science Science 7 and each piece grows into a complete organism. This is known as regeneration (see Fig. 7.3). Regeneration is carried out by specialised cells. Thes...
Class X Science Science 7 some do not. ■ Spread some cotton on a tray and wet it. Place the potato pieces on this cotton. Note where the pieces with the buds are placed. ■ O...
Class XII Physics Physics Part-II 5 of a nucleus determined by electron scattering is found to be slightly different from that determined by alpha-particle scattering. This is because...
Class X Science Science 7 reproductive parts. On the other hand, the tiny blob-on-a-stick structures are involved in reproduction. The blobs are sporangia, which contain cel...
Class X Science Science 7 It would therefore make sense if organisms came up with reproductive modes that allowed more and more variation to be generated. While DNA-copying ...
Class X Science Science 7 nonreproductive body cells. This is achieved by a process of cell division calledmeiosis.Thus,whenthesegerm-cellsfromtwoindividualscombine during s...
Class X Science Science 7 Science Reprint 2026-27 The swollen bottom part is the ovary, middle elongated part is the style and the terminal part which may be sticky is the s...
Class X Science Science 7 water and cover the seeds with a wet cloth and leave them for a day. Figure 7.9 Make sure that the seeds do not become dry. Germination ■ Cut open ...
Class X Science Science 7 those of others in new ways. On the other hand, there are also changes taking place that are different between boys and girls. In girls, breast siz...
Class X Science Science 7 While that is happening, the maturation of the reproductive tissue is not likely to be a major priority. Thus, as the rate of general body growth b...
Class X Science Science 7 in the previous chapter. In additiontoregulatingtheformationofsperms, testosterone brings about changes in appearanceseeninboysatthetimeofpuberty. ...
Class X Science Science 7 from the mother’s blood with the help of a special tissue called placenta. This is a disc which is embedded in the uterine wall. It contains villi ...
Class XI Chemistry Chemistry Part-I 6 the pH of 0.04 M sodium nitrite solution and also its degree of hydrolysis. 6.62 A 0.02M solution of pyridinium hydrochloride has pH = 3.44. Calcul...
Class X Science Science 7 pressures about these issues. There can be pressure from our friends for participating in many activities, whether we really want to or not. There ...
Class X Science Science 7 Other contraceptive devices such as the loop or the copper-T are placed in the uterus to prevent pregnancy. Again, they can cause side effects due ...
Class X Science Science 7 the time of puberty? 4. How does the embryo get nourishment inside the mother’s body? 5. If a woman is using a copper-T, will it help in protecting...
Class X Science Science 7 of sperm in the vagina of the female. Fertilisation occurs in the fallopian tube. ■ Contraception to avoid pregnancy can be achieved by the use of ...
Class X Science Science 8 CHAPTER 8 Heredity e have seen that reproductive processes give rise to new individuals W that are similar, but subtly different. We have discussed...
Class X Science Science 8 in a species have equal these differences will be unique, others willancesofsurvivingintheenvironmentinwhichthey be inherited from their respective...
Class X Science Science 8 (b) attached the fact that both the father and the mother contribute practically equal earlobes. The lowest part of the ear, called the amounts of ...
Class X Science Science 8 was seen, not some mixture of the two. So the next question was, were the tall plants in the F1 generation exactly the same as the tall plants of t...
Class X Science Science 8 seeds are thus dominant traits. But what happens when these F1 progeny are used to generate F2 progeny by self-pollination? A Mendelian experiment ...
Class X Science Science 8 discussing are correct, then both parents must be contributing 315 round, yellow 9 equally to the DNA of the progeny during sexual reproduction. We...