BIOLOGY 1 Marks Question

Viruses and viroids.

Kingdom Monera.

Monera, Protista, Fungi, Plantae, Animalia.

Dolipores or central pores are barrel-shaped outgrowths present in septa of class-Basidiomycetes (club fungi).

Plasmogamy.

Glycogen and fat.

Mycoplasma.

Pleuropneumonia like organism, Mycoplasma.

The separation of fibres from soft tissue is called retting of fibres, e.g., jute, flax. Bacterium used for this is Pseudomonas fluoroscens.

Gonyaulax.

 Ascospores; they are formed in asci (ascus-singular).

Basidiomycetes (the club fungi) are the most advanced and most commonly seen fungi.

Parasites have phagotrophic and absorptive type of nutrition.

Chrysophyta.

Cyanobacteria are prokaryotic organisms belonging to kingdom-Monera.

Archaea and Bacteria.

Aristotle divided animals in two groups. These are Enaima (with red blood) and Anaima (without red blood).

Sponges, coelenterates, helminthes, annelids, arthropods, molluscs, Echinodermata, amphibian, reptiles, ayes and mammals.

Euglena, dinoflagellates and zooflagellates.

Linnaeus proposed the two kingdom classification in 1758.

Silica.

Kingdom Monera.

Lactobacillus.

Viruses pass through the bacteria-proof filters.

Body organisation in members of Kingdom-Animalia is cellular, tissue, organ and organ system level.

The fungi, which grow on the dung of animals, are called coprophilous fungi.

Gametangial copulation, e.g., Rhizopus, Mucor, etc.

Archaebacteria.

Methanogens.

D.I. Ivanowsky discovered tobacoo mosaic virus.

Diatomaceous earth refers to the deposits of the nearly indestructible siliceous cell wall of diatoms in the ocean floor.

• It is used in filtration of oils and syrups.
• It is used in polishing of metals.

Gonyaulax.

Cell wall and chloroplasts are absent in cells of members of kingdom-Animalia.

Diatoms are called the jewels of the plant kingdom because of cell wall ornamentation and presence of golden brown chromatophores.
There are two types of diatoms, i.e., the pennate diatom and centric diatom. Pennate diatoms are like small rectangular soap boxes. Centric diatoms are circular.

Michell.

Wriggling, cilia, mucilage propulsion, pseudopodia.

Puccinia graminis tritici causes black stem rust of wheat.

Mode of nutrition in which organism derive nourishment from both autotropic and heterotrophic mechanisms,e.g., Euglena.

Algae, bryophytes, pteridophytes, gymnosperms and angiosperms.

Dinoflagellates are unicellular eukaryotes. Most of them have two flagella; one lies longitudinally and the other transversely in a furrow between the wall plates. Dinoflagellates belongs to kingdom protista.

Due to the presence of rapid asexual reproduction.

When female mosquitoes like Anopheles, suck human blood, it simultaneously injects a poisonous liquid containing the protozoan cells into our blood. This poison causes the itching and causes swelling of the area.

Mycorrhiza can be of two types:

1. Ectomycorrhiza.
2. Endomycorrhiza.

Diatoms and desmids.

Capsid is a proteinaceous covering around the virus. It protects the nucleoid from damage from physical and chemical agents.

Bacteria are prokaryotes which belong to kingdom-Monera. Monerans do not have nuclear membrane enclosing the nucleus of the cell.

Cysts formation helps to overcome unfavourable condition for reproduction.