Answer: (c) Green plants and some bacteria

Explanation: The organisms which can use materials from inorganic sources to produce their own food are known as Autotrophs. Generally, the autotrophs are certain kinds of bacteria, algae as well as plants?for example, Cyanobacteria, algae, plants, etc.

Answer: (d) All of the above

Explanation: The term Autotroph means “self-feeder”. So, autotrophs refer to those organisms which can produce their own food using light, water, carbon dioxide, and other chemicals. They are producers in a food chain, e.g., plants on land and algae in the water.

Answer: (a) Chlorophyll

Explanation: In green plants, chlorophyll pigment, which is present in the plant cell that helps to synthesis their own food by absorbing energy from the sunlight.

Answer: (c) Green leaf

Explanation: Chlorophyll is mainly present in the leaves of a plant.

Answer: (c) Liver

Explanation: The liver is the largest gland in the human body. It plays an important role in digestion. The liver is one of the largest organs in the body which metabolizes, detoxifies, and filters harmful drugs and substances in our body. It also stores vitamins, minerals and synthesizes proteins, enzymes and bile.

Answer: (b) Saprotrophic Nutrition

Explanation: Saprotrophic nutrition occurs in saprotrophs and is associated with fungi and soil bacteria.

Answer: (a) Sphygmomanometer

Explanation: A sphygmomanometer is used to measure blood pressure in humans. The blood pressure reading obtained by using a sphygmomanometer is composed of two numbers that indicate systolic and diastolic pressures. E.g., 120/80 mm Hg.

Answer: (a) 120/80 mm Hg

Explanation: The normal range of blood pressure is categorized within a number less than 120 to 80 mm Hg. If the blood pressure results fit into this category, we have to stick with heart-healthy habits like a balanced diet and exercise.

Answer: (c) Photosynthesis

Explanation: Photosynthesis is a biological process through which plants manufacture their food with light from the sun and inorganic sources. Green plants convert light energy into chemical energy by photosynthesis, or they are able to fix carbon from the carbon dioxide into organic compounds.

Answer: (c) Adenosine triphosphate

Explanation: ATP stands for Adenosine Triphosphate. It a high-energy molecule found in the cells of the human body, animals, plants, etc. It is capable of storing and supplying the energy needed by cells.

Answer: (c) Transport of O₂

Explanation: Haemoglobin is present in the red blood cells. It transports oxygen to the tissues of the human body. Hemoglobin carries oxygen throughout the body. The iron in hemoglobin gives RBC/blood its red color.

Answer: (d) In day and night both

Explanation: The term Respiration is a biochemical process that is used to release energy from the organic compounds that are then used to carry out various physical activities. Respiration in plants takes place all-time, day and night.

Answer: (c) Oxidization of glucose

Explanation: Respiration is a continuous process that occurs in the cells of all living organisms to produce energy. In this process, energy is released by breaking down glucose in the cells of the body.

Answer: (c) Pulmonary veins

Explanation: Pulmonary veins transfer the oxygenated blood from the lungs to the heart. From the lungs, the oxygenated blood enters the left atrium (left upper chamber) through the pulmonary vein and then enters the left ventricle (left lower chamber). From here, the oxygenated blood is pumped throughout the body via the aorta or arteries.

Answer: (c) Dialysis

Explanation: Dialysis is a procedure that is used to clean the person’s blood by separating the urea from it.

Answer: (a) Ureter

Explanation: Ureter are the narrow tubes that carry urine from the kidneys to the bladder. The ureter is the tubes that connect the kidney and urinary bladder.

Answer: (c) Kidneys

Explanation: Kidneys filter the toxins and waste out of the blood. Kidneys are the bean-shaped organs that filter the blood and remove the waste.

Answer: (d) Cytoplasm

Explanation: Glycolysis takes place in the cytoplasm. The cytoplasm is a gel-like material or fluid present inside the cell and is surrounded by the cell membrane. It mostly comprises water, salts, and proteins. The organelles of the cell remain suspended in the cytoplasm.

Answer: (b) Osmosis

Explanation: The roots of plants absorb the water from the soil through osmosis.

Answer: (b) Capillaries

Explanation: None

Answer: (c) Food vacuole

Explanation: In amoeba, the food is digested in the food vacuole with the help of enzymes.

Answer: (d) Absorption of water

Explanation: The functions of the large intestine include absorbing water and electrolytes, producing and absorbing vitamins, etc.

Answer: (b) Alveoli

Explanation: Alveoli are the functional units of the lungs that form the site of gaseous exchange.

Answer: (d) 72

Explanation: A normal resting heart rate for an adult human is 60-100 beats per minute. When the rate of beats is higher than 100bpm at rest, it is called Tachycardia, and the rate of heartbeat lower than 60bpm at rest is called Bradycardia. During sleep, the slower speed of heartbeat around 40-50bpm is considered normal.

Answer: (a) Left Ventricle

Explanation: The human heart has four chambers: two atria (singular: atrium) in the upper half and two ventricles in the lower half. Although the left and right ventricles are the stronger chambers, the left ventricle is the strongest chamber of the heart. The left ventricle pumps oxygen-rich blood to the entire body.

Answer: (b) Affinity of hemoglobin with oxygen decreases

Explanation: None

Answer: (b) Lung

Explanation: Lungs are the important organs that help human beings in respiration. The term Respiration means a biochemical process that is used to release energy from the organic compounds that are then used to carry out various physical activities.

Answer: (b) True

Explanation: In herbivores, the small intestine is longer than in carnivores. Herbivores eat grass that contains cellulose which takes a long time to digest. So herbivores need the longer small intestine to digest cellulose.

Answer: (c) Lipase

Explanation: Amylase and Lipase are digestive enzymes. Lipase enzyme helps the body to digest fats. It is made by the pancreas and released into the digestive tract on eating.

Answer: (a) Emulsification of fat

Explanation: Bile juice helps in the emulsification of fats, and it also activates the lipase enzyme. Bile salts in bile are required for the emulsification of fats for the purpose of digestion.

Answer: (b) Haemoglobin

Explanation: Haemoglobin is present in the human blood and red in color. It is the respiratory pigment in human beings. It is vital for human survival as it carries the dissolved oxygen.

Answer: (a) Nitrates and nitrites

Explanation: None

Answer: (b) Aerobic respiration

Explanation: Aerobic respiration occurs in the presence of oxygen (requires oxygen). A large amount of energy is released in aerobic respiration. It generates 36 ATP molecules per glucose molecule. It occurs in multicellular organisms like plants, animals, humans, etc.

Answer: (b) 6m – 9m

Explanation: The alimentary canal is a continuous passage that starts from the mouth and ends at the anus. It is a significant part of the digestive system as it carries the food through different digestive system parts. It is approximately 9m long from the oesophagus to the anus. So, the correct answer is 6m – 9m.

Answer: (c) 20

Explanation: Teeth are one of the essential parts of the human body. They participate in many activities of the human body. Teeth start to appear as soon as children start to wean. Children usually have 20 teeth, called primary, temporary, or milk teeth.

Answer: (d) Amino acids

Explanation: Proteins are converted into amino acids after digestion.

Answer: (d) Bile juice

Explanation: Bile is a digestive juice that is secreted by the liver. It is stored in the gallbladder.

Answer: (b) lungs

Explanation: The deoxygenated blood enters the right atrium (right upper chamber) through the superior vena cava (vein), then passed to the right ventricle (right lower chamber), and then pumped to the lungs through the pulmonary artery.

Answer: (a) Vitamin C

Explanation: Vitamin C and all types of vitamin B are water-soluble. People need to regularly consume water-soluble vitamins because the body removes them more quickly, and it cannot store them easily.

Answer: (a) Small intestine

Explanation: The small intestine receives the bile from the liver.

Answer: (b) Heterotrophs do not synthesize their own food

Explanation: Heterotrophs are those organisms that are unable to prepare their own food, and for their food, they depend on green plants or producers and other animals. This mode of nutrition is called the heterotrophic mode of nutrition.

Answer: (a) Alveoli of lungs

Explanation: Alveoli are the functional units of the lungs that form the site of gaseous exchange.

Answer: (c) Xylem

Explanation: None

Answer: (d) Mouth –> oesophagus –> stomach –> small intestine –> large intestine

Explanation: None

Answer: (a) kidney –> ureter –> urinary bladder –> urethra

Explanation: None

Answer: (b) Nostrils –> Pharynx –> Larynx –> Trachea –> Alveoli

Explanation: None

Answer: (c) Blood = Plasma + RBC + WBC

Explanation: None

Answer: (c) Nephrons

Explanation: None

Answer: (a) Glucose –> pyruvate –> carbon-dioxide + ethanol + energy

Explanation: None

Answer: (b) W.B.C.

Explanation: None