Class name Subject Book title Chapter number Content Created at
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 9 surface of a spherical mirror forms a part, is called the radius of curvature of the mirror. It is represented by the letter R. You may note thatth...
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 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...
Class X Science Science 8 sexes participating in sexual reproduction must be somewhat different from each other for a number of reasons. How is the sex of a newborn individu...
Class X Science Science 8 be a girl, and one human beings who inherits a Y chromosome from him will be a boy. 132 Science Reprint 2026-27 Q U E S T I O N S 1. How do Mendel’...
Class X Science Science 8 dominant or recessive? Why or why not? 3. Outline a project which aims to find the dominant coat colour in dogs. 4. How is the equal genetic contri...
Class X Science Science 9 CHAPTER 9 Light – Reflection and Refraction e see a variety of objects in the world around us. However, we are W unable to see anything in a dark r...
Class X Science Science 9 nature. In this Chapter, we shall study the phenomena of reflection and concepts will help us in the study of some of the optical phenomena ine bas...
Class X Science Science 9 you have seen that the sharp bright spot of light you got on the paper is, in fact, the image of the Sun. It was a tiny, real, inverted image. You ...
Class X Science Science 9 position of the object in such a case. Then, look for its virtual image in the mirror itself. ■ Note down and tabulate your observations. Light – R...
Class X Science Science 9 a point could be considered. However, it is more convenient to consider only two rays, for the sake of clarity of the ray diagram. These rays are s...
Class X Science Science 9 the angle of reflection equals the angle of incidence. (a) Image formation by Concave Mirror Figure 9.7 illustrates the ray diagrams for the format...