11th Biology Chapter 2
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– Kingdom Monera: Study the characteristics of bacteria, including their shapes (Coccus, Bacillus, Vibrium, Spirillum), habitats, metabolic diversity, and the division into Archaebacteria and Eubacteria based on habitat and cell wall differences【4:0†source】.
– Kingdom Fungi: Learn about the different classes of fungi such as Phycomycetes, Ascomycetes, Basidiomycetes, and Deuteromycetes based on characteristics like mycelium morphology, mode of spore formation, and fruiting bodies【4:1†source】【4:2†source】.
– Kingdom Plantae: Understand that this kingdom includes chlorophyll-containing organisms, the alternation of generations, and various plant groups like algae, bryophytes, pteridophytes, gymnosperms, and angiosperms【4:3†source】.
– Kingdom Animalia: Explore the characteristics of multicellular, heterotrophic organisms without cell walls that depend on plants for food, their mode of nutrition, reproduction, and sensory mechanisms【4:4†source】.
– Viruses, Viroids, Prions, and Lichens: Gain knowledge about viruses as non-living organisms with genetic material (RNA/DNA), protein coats, and their role as obligate parasites causing diseases in both plants and animals【4:4†source】.
What is the nature of cell-walls in diatoms?
The cell walls of diatoms are indestructible, formed of two thin overlapping shells embedded with silica.
What do the terms 'algal bloom' and 'red-tides' signify?
An algal bloom refers to a rapid increase in the population of algae, potentially causing water discoloration. Red-tides are caused by red dinoflagellates, leading to a reddish appearance in the sea and toxin release affecting marine life.
Describe briefly the four major groups of Protozoa.
Protozoans are all heterotrophs and belong to four major groups: amoeboid protozoans, flagellated protozoans, ciliated protozoans, and sporozoans.
Plants are autotrophic. Can you think of some plants that are partially heterotrophic?
Some partially heterotrophic plants include insectivorous plants like Venus flytrap and pitcher plants, which supplement their nutrient intake by trapping and consuming insects.
What are the characteristic features of Euglenoids?
Euglenoids are freshwater organisms with a protein-rich layer called pellicle instead of a cell wall, two flagella, and can behave like heterotrophs in the absence of sunlight.
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