5.Write a note on economic importance of algae and gymnosperms. Ans. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Did you find NCERT Solutions Class 11 Biology chapter 3 Plant Kingdom helpful? Economic importance of gymnosperms is as follows: Antherozoid (male gamete) and egg (female gamete) fuses and form zygote.Zygote develops into a sporophyte; which is differentiated into foot, seta and capsule and spores are produced in the capsule. The Plant Kingdom, we're growing a new standard of living. Primary endosperm nucleus in dicot – triploid. NCERT Exemplar Class 11 Biology is very important resource for students preparing for XI Board Examination. Question 1. Archegonium is the female sex organ that produces the female gamete or egg. Life cycle of a fern (Dryopteris) Dryopteris is a common fern with pinnately-compound leaves. Class 11 NCERT solutions answers all the questions given in the NCERT textbooks in a step-by-step process. Download NCERT Solutions for Class 11 Biology Chapter 3 Plant Kingdom (Link of Pdf File is given below at the end of the Questions list) In this pdf file you can see answers of following Questions . -The male cone is made of overlapping microsprophylls, that bear micros¬porangia on the abaxial side which produce microspores. Plant Kingdom ( All ) Select Topic. Algae is divided into 11 classes but among them 3 main classes are Chlorophyceae, Phaeophyceae and Rhodophyceae. Question 1. These MCQ Questions on Getting to Know Plants Class 6 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Three kingdom classification. Briefly comment on its significance. These questions are repeatedly asked in exams in one or other way round. A fresh water green alga, rich in protein is. Liverwort — In liverworts, the main plant-body is haploid (gametophytic). Reduction division takes place in these sporangia, thereby producing many spores. NCERT Solutions for Class 11 Biology Chapter 3 Plant Kingdom to Study online or free PDF file to download updated for new academic session 2020-2021 based on latest NCERT Books for CBSE Board. Reduction division in a liverwort and moss takes place at the end of the sporophytic generation, where haploid spores are formed by reduction division of spore mother cell inside capsule. C. Chlamydomonas. Spores germinate to produce dominant gametophytic generation. This solution contains questions, answers, images, explanations of the complete chapter 3 titled Plant Kingdom of Biology taught in Class 11. -Phloem contains sieve cells and phloem parenchyma and companion cells are absent (except in Gnetum; Ephedra and Weluhtschia). – In embryo 2 or many cotyledons are present. On death and decay these algae give off bad smell. Both these stages are haploid or gametophytic. They perform half of the total carbon dioxide-fixation on earth by photosynthesis, acting as the primary producers in aquatic habitats. is used in pharmaceutical emulsifier and textile, leather, cosmetic industries. 8.Explain briefly thefollowing terms with suitable examples. On maturing, these spores dehisce and germinate to give rise to a heart-shaped gametophyte called prothallus. Advice Questions. PLANT KINGDOM POINTS TO REMEMBER ... their names and role in the plants. Multiple Choice Questions Question 1. Briefly describe the life cycle of any one of them. When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm and an angiosperm? Subject- Botany chapter- Plant Kingdom Read full ncert pdf online with notes & video guides. The male sex organ in the flower is the stamen, while the female sex organ is the pistil. Some sea weeds like Fucus, Litlwphyllum, Lycophyllum etc. Name three groups of plants that bear archegonia. The zygote forms an embryo, which in turn develops into a new sporophyte. Soln.The term gymnosperm is derived from two Greek words: Gymnos = naked + Sperma = seed, i.e., naked seeded plants. Major pigments — Chlorophylls a and b Stored food — Starch The prothallus bears the male and female sex organs called antheridia and archegonia respectively. The young plant comes out of the archegonium of the parent gametophyte. Prothallus cell of a fern – haploid. MCQ Questions for Class 7 Science with Answers were prepared based on the latest exam pattern. The first stage ) develops into a new sporophyte multicellular, Chlorophyll containing having. Of turpentine, wood alcohol these questions are important from an exam as... One type ( homospory ) or of two types of woods to help you stay updated with relevant study for. Male and female sex organ in the treatment of asthma and bronchitis to REMEMBER... their names role... Pinus, Abies, Cedrus are the chief source of resins: resins used... 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