Biology Section 8

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• Coccobacillus has a shape similar to an egg.
• The first bacterium isolated was Bacillus.
• Thick, rigid, and spiral bacteria are called Spirillum.
• A group of 8 cocci is called Sarcina.
• Approximately 200 species of bacteria are known to cause diseases in humans.
• Cyanobacteria reproduce by binary fission.
• Gas vesicles help cyanobacteria to locomote.
• Cyanobacteria have Gram-negative cell walls.
• Louis Pasteur developed the vaccine against anthrax.
• Chemical substances used on living tissues that inhibit the growth of microorganisms are called antiseptics.
• Rapid growth at an exponential ratio occurs in the Log phase of bacterial growth.
• Spirochete is an example of Anaerobic bacteria.
• coli is an example of Facultative bacteria.
• Nitrifying bacteria are examples of Chemosynthetic bacteria.
• Bacteria fully dependent upon their host for nutrition are called Parasitic bacteria.
• Purple non-sulphur bacteria is an example of Photosynthetic bacteria.
• Campylobacter is an example of bacteria requiring low concentration of oxygen.
• The common waste material in bacteria is Lactic acid.
• Plasmids contain genes for drug and disease resistance in bacteria.
• Cocci bacteria do not have flagella commonly.
• A bacterium with tuft of flagella at both poles is called Amphitrichous.
• Flagella originate from the basal body.
• Slime primarily helps in the attachment of bacteria on various surfaces.
• Pili help in the attachment of bacteria on various surfaces.
• Cell wall is absent in Mycoplasma.
• Cell wall of Archaeobacteria does not contain Peptidoglycan.
• Gram-positive bacteria appear Purple.
• Extremely long molecules of DNA tightly folded to fit inside the cell are called Chromatin bodies.
• All of the following are coelomates except Aschelminthes.
• The radial symmetry is found in Cnidaria animals.
• Both radial and bilateral symmetry are found in Echinodermata.
• All of the following have blood vascular systems except Arthropoda.
• Schizocoelom is a coelom formed due to splitting of mesoderm.
• True metamorphosis is not present in Arachnida.
• Mantle in molluscs is present over the dorsal visceral region.
• Aquatic arthropods respire through gills and book lungs.
• Circulatory system is open type in Gastropoda.
• Shell of egg is leathery in appearance in Reptiles.
• Aschelminthes is also known as Nematodes.
• The name animal is derived from the word Anima.
• Animals of the grade Radiata are Diploblastic.
• True metamorphosis is not present in Insecta.
• Excretory system of platyhelminthes consists of Flame cells.
• Pseudocoelom develops from the Blastocoel.
• Exoskeleton of coelenterates is made up of Calcium and Silica.
• The skeleton of sponges is made up of Calcium and Silica.
• The skeleton of sponges is made up of spicules.
• Gut in pseudocoelomates is made from Endoderm.
• Sperms are Mesodermal in origin.
• Inner layers of the sponges are made up of Choanoytes.
• The common waste material in bacteria is Lactic acid.
• Plasmids contain genes for drug and disease resistance in bacteria.
• Gram-positive bacteria appear Purple.
• Approximately 200 species of bacteria are known to cause diseases in humans.
• Chemical substances used on living tissues that inhibit the growth of microorganisms are called antiseptics.
• Campylobacter is an example of bacteria requiring low concentration of oxygen.
• Scolymastra joubini is a sponge of Antarctica.
• Gas vesicles help cyanobacteria to locomote.
• A group of 8 cocci is called Sarcina.
• Pili help in the attachment of bacteria on various surfaces.
• Spirochete is an example of Anaerobic bacteria.
• coli is an example of Facultative bacteria.
• All of the following coelenterates show alternation of generation except Hydra.
• Cyanobacteria reproduce by binary fission.
• The tissue responsible for secondary growth in dicot stems is called Cambium.
• The process of water movement through a plant from root to leaves is known as Transpiration.
• The pigment responsible for capturing light energy in photosynthesis is Chlorophyll.
• The male reproductive part of a flower is called Stamen.
• The female reproductive part of a flower is called Pistil.
• The process of conversion of glucose into pyruvate is known as Glycolysis.
• The enzyme responsible for breaking down starch into maltose in the mouth is Amylase.
• The hormone responsible for regulating blood sugar levels is Insulin.
• The process by which plants release oxygen into the atmosphere is called Photosynthesis.
• The smallest unit of an element is an Atom.
• The process by which an atom gains an electron and becomes negatively charged is called Reduction.
• The part of the eye that contains photoreceptor cells is the Retina.
• The type of rock formed from cooled lava is known as Igneous rock.
• The layer of the Earth’s atmosphere where weather phenomena occur is the Troposphere.
• The process by which sediment is carried away by wind or water is called Erosion.
• The first element on the periodic table is Hydrogen.
• The layer of the Earth’s atmosphere that absorbs most of the harmful ultraviolet radiation from the sun is the Ozone layer.
• The process by which an atom loses an electron and becomes positively charged is called Oxidation.
• The process of plants losing water vapor through small pores on their leaves is called Transpiration.
• The molecule that carries genetic information in cells is DNA.
• The planet with the largest number of moons in our solar system is Jupiter.
• The scientist who developed the theory of general relativity is Albert Einstein.
• The gas responsible for the greenhouse effect on Earth is Carbon dioxide.
• The device used to measure earthquakes is a Seismometer.
• The process of a liquid turning into a gas at the surface of the liquid is called Evaporation.
• The phenomenon that causes the deflection of moving objects from a straight path due to the Earth’s rotation is called Coriolis effect.
• The SI unit of electric current is Ampere.
• The process of plants using sunlight to make their own food is called Photosynthesis.
• The type of electromagnetic radiation that has the shortest wavelength is Gamma rays.
• The largest planet in our solar system is Jupiter.
• The process of a gas turning into a liquid is called Condensation.
• The process of one tectonic plate being forced under another is known as Subduction.
• The natural habitat of an organism is called its Ecosystem.
• The scientist who proposed the theory of evolution by natural selection is Charles Darwin.
• The process of changing from a solid directly to a gas without passing through the liquid phase is called Sublimation.
• The densest naturally occurring element is Osmium.