Biology Section 14

Biology Section 14 The blood vessel carrying blood from the lungs to the heart is the pulmonary vein. Infectious droplets do not transmit Rubella, the common cold, or influenza. There are 14 “True Ribs” in the human body. Transport of oxygen by blood takes place with the help of erythrocytes. Major biological issues today encompass […]

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Biology Section 13

Biology Section 13 Dorsal root of spinal nerves contains receptor neurons. The study of interaction between living organisms and their environment relates to Ecology. Anoxia is a condition characterized by an absence of oxygen supply to an organ’s tissues. Viruses are acellular. The time an organism is present in the body before causing disease is

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Biology Section 12

Biology Section 12 Kidney is responsible for blood filtration. Liver is responsible for body metabolism. The part of the brain that connects the two hemispheres is called the Corpus callosum. Cell organelles are formed in the G2 Phase of the cell cycle. Vacuoles are fluid-filled sacs surrounded by a membrane called tonoplast. During cell division,

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Biology Section 11

Biology Section 11 Single circuit heart is found in fishes. Stomata open due to active transport of K+ into the guard cells from the surrounding epidermis. Hearts of earthworms are present lateral to the oesophagus. Plasma constitutes about 55% by volume of blood in a normal person. Brown fat in certain mammals is specialized in

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Biology Section 10

Biology Section 10 Secondary growth in plants, increasing girth, is due to activity of cork cambium and vascular cambium. Fractures in old age heal slowly due to weak bones and lack of good blood supply. When screws and wires are used to unite fractured bone ends, it’s called open reduction. Vascular cambium appears between primary

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Biology Section 9

Biology Section 9 What is present inside the vertebral column? – Spinal cord. What is the largest part of the brain? – Cerebrum. What is the second largest part of the brain? – Cerebellum. What controls intelligence? – Cerebrum. What acts as a thermoregulator? – Hypothalamus. Which part allows precise muscular movements? – Cerebellum. Which

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Biology Section 8

Biology Section 8 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

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Biology Section 7

Biology Section 7 Mitochondria in ear lobe cells are nearly 50. Four daughter cells are given rise during the process of meiosis. Mitosis gives rise to two daughter cells during cell division. In animals, meiosis produces gametes. Prokaryotic and eukaryotic are two types of cells. Cells are of 2 types. Gametophyte of Psilopsida develops a

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Biology Section 6

Biology Section 6 Masses of dilated tortuous veins in the anorectal mucosa are known as Hemorrhoids. Puccinia is a parasitic Fungus. An illness which largely affects girls usually just after the onset of puberty is Anorexia nervosa. Autotrophic organisms can exist in an exclusively Inorganic environment. Loss of appetite due to the fear of becoming

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Biology Section 5

Biology Section 5 During winter, animals are likely to undergo thermogenesis. In esterification, the OH group comes from alcohol. Four carbon atoms are required to form a furan ring (ribofuranose). Sleep movements are a type of turgor movements. The keto group is represented as CO. Habituation is the type of learning involving a loss in

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