After sometime the food supply becomes less as compared tothe population increases. It has three phases:-. Contains solved exercises, review questions, MCQs, important board questions and chapter overview. 23.Name the mechanism employed by ophrys to get its flowers pollinated? Q.3. Orchid flower, Ophrys co-evolves to maintain resembelance of its petal to female bee. Download Free PDF Notes and Free Study Material for SSC CGL, CHSL, UPSC, IAS, RAS, Railway RRB NTPC and Group D, Bank PO - Clerk SBI, IBPS Exams. Plants offer rewards or fees in the form of seed dispersers “plant – animal interactions often involve co-evolution of the mutualists that is, the evolution of the flower & its pollinator species can be pollinated only by its partner wasp species & no other species. 10.Give any two examples of defense mechanism in plants against herbivory? iii)Some prey are poisonous & hence are avoided by predators . 17.Name the bind of interaction present between the following :-, Ans. Ans.Orchids grows as epiphytes on mango tree. v)plants also produce certain chemicals which functions as :-. Syllabus for Class 11 2017-18. iii) Hermit crab & sea anemone:- Hermit crab & sea anemone shows commensalism as hermit crab isbenefited because it gets protection from predators which stays away from stinging tentacles of the seaanemone. Ans.plant species evolved various defense mechanism to reduce impact of predation :-. 14.What is migration? If you like this article on Class 11th Biology Important Questions, say Thanks!!! i)They act as conduct for energy transfer to higher trophic level. Write what do phytophagous insects feed on? Here you will find Chapter Wise NCERT MCQ Questions for Class 11 Biology with Answers PDF Free Download based on the important concepts and topics given in the textbook. NCERT Solutions for Class 11 Biology in English Medium updated for new academic session 2020-21 in PDF format free. ii) Head louse & humans:- Head louse shows ectoparasitism on humans in which head louse is gettingnutrition from human body & is thus benefited while human beings are harmed. Body adapts by : How are some microbes able to live in habitat with temperature exceeding 1000c. iii)They help in maintaining species diversity in a community. thorns in bougainvillea. What are the four ways through which the living organisms respond to abiotic factors? Ans.Some microbes are able to live in habitats with temperate exceeding 1000 c because theypossess minimum amount of free water in their body. CBSE Notes for Class 11 Biology Unit 1 – Diversity of Living Organism 1. Check these questions for self-analysis and prepare for the exam more effectively. They can go through these questions and prepare them well before the exams. Green plants synthesize their own food which is utilized by them and other organisms dependant on them, through a process known as photosynthesis. After downloading these chapter wise notes and chapter wise important questions of class 12 Biology, Let’s have a look at the analysis and research we have done on each chapter of 12th biology. They are unable to cope with outside hypotonic environment because ofOsmoregulation problem. Male bee transfers pollen to another flower when the same bee pseudocopulates with another flower. all birds,mammals some lower vertebrates & invertebrates, for example in summer, when outside temp is morethan our body temperature we sweat profusely evaporative cooling brings the body temp – down.Whereas those organisms which cannot maintain a constant internal environment. Ans.Mammals living in colder regions have short ears & limbs to minimise heat loss. Justify with the help of an example of why nucleic acids display secondary structure. 4. Some organic compounds found in living entities are monosaccharides, amino acids, fatty acids, glycerol, sugars, nucleosides, nucleotides, etc. Why or why not? Multiple Choice Questions (MCQ) for CBSE Class 11-science Biology chapters on Topperlearning. Plant Kingdom 4. Important Questions for Class 11 Biology Chapter 9 Biomolecules are available here for students to boost their exam prepration. Access full series of free online mock tests with answers from Biology Class 11. Δt – change in time. Calculate the death rate if 6 individuals in a laboratory population of 60 fruit flies died during a particular week. 11.What is Brood parasitism? Ans.Gause’s competitive exclusion principle states that two closely related species competing for the same resources cannot exist together as the competitively inferior one will be eliminated but this is true only when resources are limiting & not otherwise. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11.. In the vicinity of the substrate, the active site of the enzyme breaks the chemical bonds of the substrate leading to the formation of the new enzyme-product complex. R – biotic potential. cuckoo bird lays eggs in the nest of crow. 6.List the important characteristics of a population & Explain? Species facing competition might evolve mechanism that promotes coexistence rather than exclusion. Biology Important Questions Class 11 are given below chapter wise.. Ans. Give an example. For example, the Watson-Crick model. Class 11 Important Questions Biology Chapter 1 The Living World. (iii) single huge banyan tree with large canopy . Ans.The kangaroo rat in North American deserts is capable of meeting all its water requirement through its internal oxidation of fat, where water is by-product, it can also concentrate its urine to a minimal volume. Which organisms exhibit it? Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11.. 3.Describe the exponential growth model of a diagram along with a curve? NCERT books and answers, study material for final exams and other online study books for revision are available to free download. Q.4. Describe the structure and function of ATP? Name the type of organisms which will show:-. This ensures that the student can easily understand what is being said. Several lipids have fatty acids and glycerol wherein the fatty acids are esterified with glycerol, which results in diglycerides, triglycerides, monoglycerides and are known as oils and fats depending upon the melting point. Oxidoreductase catalyzes the following reaction between substrates A and A’, complete the reaction. The wasp pollinates the fig inflorescence while searching for suitable egg-laying sites. i) What is the name given to curve (a) & (b). 2. Ans.Leaves contains sunken stomata i.e. Their bodytemperature changes with ambient temperature e.g. i) Expanding pyramid:- It is a broad base, triangular pyramid which represents a population containing large number of young people. Write a short note on the rubber. iv)Plants have evolved certain morphological, or chemical defense mechanism against herbivores e.g. Alanine and Glycine are different with regards to one substituent on the a-carbon. Question from very important topics are covered by NCERT Exemplar Class 11.You also get idea about the type of questions and method to answer in your Class 11th … Ans. ii) Stable pyramid:- It represents a moderate proportion of young to old. Male bee is attracted to what it perceives as a female ‘pseudocopulates,’during which pollen dusted on male been is body . Though there is diversity in living entities, they share similarities in the chemical composition and metabolic reactions. A.3. K – carrying capacity i) Curve (a) is known as exponential growth curve & curve (b) is known as logistic growth curve. The J-shaped growth form is described by equation Question from very important topics are covered here for NCERT Class 11 . Explain the different forms of lipids with some examples. Comment? 11.What type of interaction is shown by sparrows eating the seeds? frog,reptiles, polar bear. Your email address will not be published. i) ADAPTATIONS INROOTS :- Xerophytes have well developed & extensively branched long rootsystem. (a) increasing red blood cell production a) Penicillin b) Sulfonamide c) Vitamin C d) Growth hormone. Ans.Migration is a phenomenon in which organisms can move away temporarily from the stressful conditions in the habitat with hospitable conditions e.g. Why do clown fish and sea anemone pair up? This causes mass starvation & mortality & results in the formation of Jshaped curve. The activity for several enzymes is affected by the ambient pH and is depicted in the curve below, explain in brief. Important questions for Class 11 Biology are prepared by the subject experts and are extensively helpful for students in their exam preparations. Fresh water animals are unable to survive for long in sea water. eggs of cuckoo birds dependson crow’s nest for its food & shelter but the crow is harmed because there is competition for limitedfood and shelter amongst the crow’s egg & cuckoo’s egg thus, in parasitic interspecific interactionthe parasite is benefited while the host is harmed. Why do small animals do not show regulations? With the help of your understanding of growth models, explain when is this possible? The most common food which has a high in protein are almond, beans, broccoli, chicken, cottage cheese, eggs, fish, milk, oats, pulses, seafood, soy, quinoa and yoghurt. Differentiate between stenohaline and euryhaline organisms. You can also Download Biology Revision Notes Class 12 to help you to revise complete Syllabus and score more marks in your examinations. 5. A.2. 13.State Gauss’s competitive exclusion principle? 10.Mutualism often involves co-evolution of mutualists. Nucleic acids display a wide variety of secondary structures. 10.Name the type of interaction that is detrimental to both the interaction. What adaptation has evolved in this phenomenon? Ans.Brood parasitism refers to the phenomenon in which one bird species by its eggs in the nest ofanother bird species Evolution has occurred in such a way the eggs of the parasitic birds resemblethose of the host bird in size, colouretc to avoid host bird detecting the foreign eggs & ejecting themfrom the nest e.g. Suitable curve fruit for nourishing its larvae tree is produced by the union of the appropriate bonds – ester,! Slow growing animal like elephant could reach enormous number in absence of water in their exam prepration be fees... 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