Q15: Organise a discussion in your class on the topic- Are viruses living or non-living? Lichens are symbiotic association between algae and fungi. They contain rigid cell wall, if motile contain flagellum. Cell is formed by membranous organelles. Correct Answer : D Explanation Bacteria are microscopic organisms whose single cells have neither a membrane-enclosed nucleus nor other membraneenclosed organelles like mitochondria and chloroplasts. .
They may be unicellular, colonial or filamentous, fresh water, marine or terrestrial. Download revision notes for Biological Classification class 11 Notes Biology and score high in exams. . They are good pollution indicator as they do not grow in polluted area. But virus is not classified along with bacteria or fungi.
A taxon is a group of related families a group of related species a type of living organism a taxon group of any ranking 7. Growth is a output of metabolism. Under warm conditions specially when sewage and inorganic waste added to water, there is sudden and explosive growth of these primary producer blue-green algae. There is an aggregation of different layers in living organisms. Q14: Give a brief account of viruses with respect to their structure and nature of genetic material. Phylum Chordata includes animals which possess a notochord either throughout or during early embryonic life, Other common features observed in the chordates are the dorsal, hollow nerve cord and paired pharyngeal gill slits.
You can also learn by reading the feedback for incorrect answers. The unique features of mammals are the presence of mammary glands and hairs on the skin. Living organism possess certain characters like-reproduction, growth, development, reaction with environment adaptation and death. The same microorganism when observed under a dissection microscope with a lens of 10 X magnification, would measure. What pigments are found in blue-green, red and brown algae that are responsible for their characteristic colours? Name the book he published on taxonomy. Members of this group show double fertilization. Phylogenetic System of Classification— Based on the evolutionary relationship of organisms.
They differ from other bacteria in having different cell wall structure absence of peptidoglycan. Biology Important Questions Class 11 are given below. Flowering and non-flowering plants, enaima and anaima. What are the characters of virus that are similar to non-living objects? We have included many questions appeared in different biology exams. The sporophytic and gametophytic phases alternate with each other to complete the life cycle.
Energy is reguired during metabolism. Q4: What is the nature of cell-walls in diatoms? While the fungal component is called mycobiont absorbs water and nutrient from soil and provides raw material. They cause disease in plants and animals. . Biflagellate—one flagellum lying longitudinally and the other transversely. You also get idea about the type of questions and method to answer in your Class 11th examination.
Body is composed by such organ systems. Multiple Choice Questions on Living World 1. Share this question with your friends Correct Answer : D Explanation Viruses are defined as infectious nucleoproteins. They lack cell wall and can survive without oxygen. Eubacteria — They are called as true bacteria.
Bryophytes are non vascular plants. New species is created due to variation, hence biodiversity forms. Meaningfully called classification which has species, genus, order, family, class, phylum and kingdom. There is an aggregation of different layers in living organisms. Sexual reproduction takes place through ascospores Asexual reproduction fragmentation Asexual reproduction spores call aconidia Q13: What are the characteristic features of Euglenoids? Q5: Name the algae which is a source of iodine.
Line specimen of plants and animals are found in botanical garden and Zoological park respectively. They are also called as living chemical. When they enter inside of the living cells, they are active and behave as living organisms Because of this they are intermediate between living and non-living things. Lichen is composite organism formed from the symbiotic association of an alga and a fungus. Hind limbs are adapted for walking, swimming, perching or clasping.
System of classification used by Linnaeus was Natural system Artificial system Phylogenetic system Asexual system 3. Static concept of species was put forward by de Condolle Darwin Linnaeus Theophrastus 2. Such living organism is known as species. They are chief producer in oceans. Viroids were discovered by Diener from infectious agents which are even smaller than viruses.