STUDY EDUCATION - MP Board Solutions

NCERT Class 8 Science Chapter 10 Reaching the Age of Adolescence Solutions NCERT TEXT BOOK EXERCISES Q. 1. What is the term used for secretions of endocrine glands responsible for changes taking place in the body? Ans. Hormones. Q. 2. Define adolescence. Ans. Adolescence: The period of life, when the body undergoes changes, leading to reproductive maturity is called adolescence. Q. 3. What is menstruation? Explain. Ans. When egg produced by ovary does not get fertilized, it along with the thickened lining of the uterus and blood vessels get flown off out of the body every month as bleeding in women. This is called menstruation. Q. 4. List changes in the body that takes place at puberty. Ans. Changes taking place at puberty in boys. (i) Height increases suddenly. The bones of legs and arms become long and make a boy tall. (ii) Boy’s shoulders become broader and chest also becomes wider. (iii) Muscles of the body grow more prominity. (iv) The voice becomes hoarse. Adam’s apple a protrud...

NCERT Class 8 Science Chapter 9 Reproduction in Animals Solutions NCERT TEXT BOOK EXERCISES Q. 1. Explain the importance of reproduction in organisms. Ans. Reproduction helps to increase the population of species. It is an important biological process for existance and continuity of a species. Q. 2. Describe the process of fertilization in human beings. Ans. In humans, fertilization occurs in the body of the female partner. The process of reproduction starts with mating during which the male releases male sex cells (sperms) into the body of the female. When sperms come in contact with an ovum (the egg) one of the sperms may fuse with the egg. Such a fusion of the sperm with the egg is called fertilization. During fertilization, the nucleus of the sperm and the egg fuse to form a single nucleus. The fertilized egg is called zygote. Q. 3. Choose the most appropriate answer: (a) Internal fertilization occurs: (i) in female body. (ii) outside female body. (iii) in male body. (iv) outside m...

NCERT Class 8 Science Chapter 8 Cell – Structure and Functions Solutions NCERT TEXT BOOK EXERCISES Q. 1. Indicate whether the following statements are True (T) or False (F). (a) Unicellular organisms have one-called body. (T/F) Ans. True. (b) Muscle cells are branched (T/F) Ans. True. (c) The basic living unit of an organism is an  organ. (T/F) Ans. False. (d) Amoeba has irregular shape. (T/F) Ans. True.  Q. 2. Make a sketch of the human nerve cell. What function do nerve cell perform? Ans. Functions: (i) Nerve cells help in the transfer of messages from various body parts to brain and brain to various parts of the body. (ii) They help also in the coordination of the functions of the organs of the body. Q. 3. Write short notes on the following: (a) Cytoplasm. Ans. Cytoplasm: Cytoplasm is a thick jelly-like fluid inside the cell membrane. All the life functions take place in the cytoplasm. There are many small cytoplasmic bodies in cytoplasm. These are called cell organelles ....