(All others are edible roots. In such condition, the stored carbohydrates in the body also deplete. Adaptations are of following types : (c) medulla oblongata (Textbook Page No. maharashtra state board class 8 science notes. What is the role of chromosomes in cell division? In absence of oxygen only glycolysis can occur but further two reactions will not take place. If the body of Sycon breaks up accidentally into only large and few fragments, then only each fragment develops into new Sycon. Question 18. Part-2-Chapter-2-Mathematical Methods (b) Museum [Students are expected to perform the given activity by themselves under the guidance of their teacher.]. From one cell, four daughter cells are obtained. (iii) Actions of hormones are very slow and long-lasting. During unfavourable conditions when there is lack of food, multiple fission is shown by amoeba. Answer: partner of couple. The digested fats are absorbed in the form of fatty acids. Part-4-Chapter 1: Rotational Dynamics Chapter-1-Solid State small bulge or bud appears on the surface of parent cell as seen in unicellular yeast. These amino acids are transported to each cell by blood circulation. (2015) Endemic and threatened flowering plants of Western Ghats with special reference to Konkan region of Maharashtra. Corpus luteum. Answer: (ii) They are also called as tropic movements. Excretory system helps in the removal of nitrogenous waste materials produced in the human body. Answer: 1 to 5 days is the period of menstruation. Choose correct option. This will clear students doubts about any question and improve application skills while preparing for board exams. Question 2. What is its effect? Controls growth of body and metabolic activities. Grazing, cultivation and collection of products from the forests is banned in such areas. Notes-Part-1-Chapter-2-Reproduction in Lower & Higher Animals Answer: They are of two types cranial nerves and spinal nerves. Part-2-Chapter-7-Wave Optics Question 3. Complete the five kingdom method of classification using-living organism, prokaryotes, eukaryotes, multicellular, unicellular, protista, animals, plants, fungi. Acetyl part of Acetyl- Co-A is completely oxidized through this cyclical process. Movement or growth of any part of the plant in response to an external stimulus is called as tropism or tropic movement. (c) to control of involuntary activities Question 2. One Biology The oneness in biology. (a) A lag phase (b) Phase of acceleration (c) Phase of deceleration (d) An asymptote, when the population density reaches the carrying capacity. It also disrupts the reproduction or even kill it. Answer: Make a list of all such different actions. Chapter-6-Superposition of Waves Chromosomes moving to the poles appear like bunch of bananas. are controlled by cerebellum. Question 7. (a) Living things show growth from within. Question 4. This principle states that two closely related species competing for the same resources cannot co-exist indefinitely and the competitively inferior one will be eliminated eventually. Answer: b. Class 9 Science Chapter 15 Life Processes in Living Organisms Textbook Questions and Answers. Find out the reason with help of the internet. Answer: Sometimes, muscle cells and erythrocytes also perform anaerobic respiration when there is lack of enough oxygen. (4) The IVF technique is done by removing the oocyte from the mother and artificially fertilizing by the sperms collected from father. They can affect the feeding herbivore. (a) phototropic What is meant by co-ordination? The eggs of koel show resemblance to the hosts egg in size and colour. Sir Hans Krebs. Answer: Question 7. False. Answer: 4. Question 4. Aerobic respiration: Cellular respiration taking place in presence of oxygen is known as aerobic respiration. Zoological parks are places where wild animals are kept in captivity. Fragmentation. (a) They form barriers to animals. Life on earth originated in water and can sustain only due to water. Polar bear shows hibernation while snails and fish show aestivation. Answer: Answer: Question 3. Moving at faster speed for escape. (c) Transpiration, Question 24. Seashells are an important part of the coastal ecosystem and are crucial for the survival of various marine creatures. More recent studies do not support such gross generalisations about competition. Prokaryotes show fission which occurs either by mitosis or amitosis. (d) ovaries What do you mean by homologous chromosomes? She should get enough rest and nutrition during this period. As a result of germination, long pollen tube and two male gametes are formed. 2. What are the essentials of a good herbarium? Ectoparasites : Project 1. Answer: Question 2. (b) Root pressure, Question 25. are produced in living organisms. They participate in the chemical reactions taking place in Krebs cycle. (a) Cerebrum False. Answer: (b) Osmosis Answer: The control is exercised by the nervous system on all these actions. The milk was on the stove. Answer: Answer: (Text Book Page No. Hence, it is necessary to remove such harmful and waste substances from the body. Answer: In order to preserve the specimen for longer durations, acid-free paper, special glues and inks must be used to mount the specimen so that the specimen does not deteriorate. It secretes . Inside the locules the meiosis takes place forming pollen grains. One species is harmed whereas the other is unaffected. Therefore, endocrine glands are also called ductless glands. The contractions of uterus help in the process of parturition. .. is just like mitosis. Stimulates growth of secondary sexual characteristics in women. Answer: This gives rise to new species after several generations. The union of gametes produce new offspring. False. Answer: With the help of the cilia the oocyte is pushed to the uterus through the fallopian duct. Seminal vesicles. Question 5. Maharashtra State Board 12th Commerce Notes Keeping & Accountancy Chapter 4 Reconstitution of Partnership (Retirement of Partner) . Question (A) Increasing awareness about environmental issues. This notch goes on deepening down and later the cytoplasm divides into two. Question 2. 3 molecules of ATP are obtained from each NADH2 molecule and 2 molecules of ATP from each FADH2. (1) The structural unit of sexual reproduction in plants is flower. Answer: What are the different uses of fatty acids ? What is tropic movement? Transverse binary fission : Paramoecium : : Longitudinal binary fission : Euglena, Question 3. (b) However, metabolic reactions can be demonstrated outside the body in a test tube (cell-free medium). Such skewed number will produce large scale abnormalities. Both the species benefit in their interactions. E.g. By the age of 45-50, the secretion of hormones which control the functioning of the reproductive system is reduced gradually and then it stops. Vegetative propagation. The zygote present inside the seed uses food stored in endosperm of seed and hence develops further to produce a new plantlet. Pollen. Koel lays its eggs in the nest of crow. Fertilization: The process by which two haploid gametes unite to form a diploid zygote is called fertilization. The rotation of earth along with its tilted axis, cause seasons. Question 2. Fragmentation: Fragmentation is the asexual type of reproduction in which the body of parent organism breaks up into many fragments. Nourishment of sperms. Different microbes and decomposers have various shapes and sizes. (2) Zygotene: In zygotene, homologous chromosomes start pairing. Release of energy from the assimilated food is called . (a) Prolactin Removal of seashells from seashores may also indirectly affect the rate of shoreline erosion. Proteins: Protein is a macromolecule which is formed by many amino acids which are joined by peptide bonds. Part-1-Chapter-3-Ionic Equilibria c. Wildlife (Protection) Act, 1972 The human nervous system can be divided into the following three parts. What is your opinion about this statement? The Gauses principle may be true if resources are limiting, but not otherwise. Answer: Answer the following questions in detail: Question 1. Vegetative propagation is performed with the help of .. in sweet potato. Absence of genetic recombination is an advantage whereas fast process is drawback of asexual reproductive method. Answer: Life Processes In Living Organisms Class 9 Maharashtra Board Question 7. The loss of water from the plants is known as transpiration. Habitat : Place or area where a particular species lives is called habitat. (a) chemotropic Fishes use shells for hiding from predators, whereas hermit crabs use shells as temporary shelters. With the help of suitable diagrams, explain the mitosis in detail. (ii) They are also called as nastic movements. A particular plant is strictly seasonal plant. What is the importance of balanced diet for body? Only one species benefits (predator and parasite, respectively) and the other species (prey and host, respectively) is harmed as the interactions are detrimental to them. 20) Part-1-Chapter-8-Respiration and Circulation Plant cells change their shape by increasing or decreasing the water content and thereby, bring about the movements of plants. Gonorrhea and Syphilis. Habitat is a physical place. Many desert plants have a thick cuticle on their leaf surfaces and have their stomata in deep pits to minimize loss of water through transpiration. Primates, carnivores, small mammals, reptiles and birds. The percolation and water holding capacity of the soils depend upon the soil composition, aggregation of particles and grain size. of ATP molecules used = 2 These are conjoined twins where some parts of body are joined to each other. ), Question 2. LH from pituitary stimulates the bursting of ovarian follicle and releases the mature oocyte out of the follicle and the ovarian wall. Passage for menstrual flow. Answer: In plants like Touch-me-not (Mimosa), movement also occurs at places other than where it has been touched. In situ conservation: It includes conservation of species in their natural habitats. Answer: (1) Haemoglobin blood Gynoecium. Ovarian follicle along with oocyte grows/regenerates under the effect of estrogen. As a response to changes in the surroundings, plant hormones bring about various movements in plants. There is common urethra through which urine and semen, are passed out. Collect the official data about present and a decade old population of various Asian countries and plot a graph of that data. (1) Some couples want a child but they are not able to bear one due to various problems either in mother or in father. Four molecules of ATP are produced in glycolysis. Describe the structure of the central nervous system. The above figure shows Telophase-II of Meiosis-II. Answer: (a) Translocation Answer: Make an video album of pollination and show it in the class. [Source: Internet my friend. In all the cells, plasma membrane is formed by proteins. Chemistry : Part-2-Chapter-5-Chemical Bonding Zoos provide information about various animals. (d) 400 ml How does reproduction take place in fungus Mucor? (2) Phototropic When we undertake constant exercises, there may be shortage of oxygen for the cells. Question 4. 1. Species are conserved in botanical gardens, culture collections and zoological parks. Life Processes In Living Organisms Class 9 Question 1. Reduce, recycle and reuse resources. Placenta: An organ developed in the uterus of the pregnant mother, through which the embryo is given nourishment is called placenta. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. In every pair, the two chromosomes are alike in shape, type and genes located over them. Pituitary: For example, whenever there is an increase in blood glucose level, certain cells in the pancreas get stimulated and as a response, they release a greater quantity of insulin, thus bringing down the sugar level to normal. Explain this statement with suitable examples. They are seen with their pair of sister chromatids. Part-1-Chapter-4-Molecular Basis of Inheritance [collapse], Part-1-Chapter-1-Linear Equations in Two Variables (Ex-1.1,1.2), Part-2-Chapter-1-Linear Equations in Two Variables (Ex-1.3,1.4,1.5), Class-11-MSBSHSE-Notes : These organisms prepare their own food in the presence of sunlight, water and carbon dioxide. In adults, the muscles of the bladder are under the voluntary control. Exponential growth shows J-shaped curve. In mitosis the chromosome number does not change. Hormones are secreted by endocrine glands. Hormones from pituitary, FSH (Follicle Stimulating Hormone) and LH (Luteinizing Hormone) and hormones from ovary, estrogen and progesterone control the menstrual cycle. (c) Gulmohar. She can also write any available information regarding the collected specimen on the herbarium sheet, which can be useful for further studies with her biology teacher. (6) The male whorl androecium is made up of stamens. Question 6. (b) dizyotic Predators keep prey population under control. determine the similarity among the parent organisms and their, offspring. Flowering of plants is dependent on sunlight to meet their photoperiodic requirement of the plants. Answer: Answer the following questions: Chemically vitamin B2 is Riboflavin. (c) hydrotropic, Question 7. Answer: Give scientific reasons. Use environment friendly products, segregate and dispose garbage correctly. Thus, there is less energy in the body and accumulation of lactic acid too. Answer: Life Processes In Living Organisms Class 9 Exercise Question 3. Answer: b. Many plants produce and store chemicals which are toxic and unpalatable. Answer: This development is only during favourable period. Question 3. (a) Digestive system: Thus, the digestive and respiratory systems work in co-ordination with each other to produce energy from food. Plants reproduce by asexual as well as sexual methods. Plants give out water in the form of water vapour through the stomata on their leaves. Answer: What are the differences? (c) 60 It was important to name animals, plants or any other living organisms in such a way to prevent any confusion which was caused before. breaking down complex insoluble food into simpler soluble form. ), Question 5.