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In which group of the organisms listed below, food material is broken down outside the body and absorbed ?
This is because these are sphrophytic organisms which breakdown food into simpler form outside their body.
The opening and closing of the stomatal pore depends upon
Stomata are the tiny pores present at the leaf surface. Each stomatal pore is surrounded by two guard cells that assist in stomatal opening driven by turgidity of guard cells. When water flows in guard cells from epidermal cells, guard cells become turgid and stomata are opened. Removal of water from guard cells makes them flaccid and stomata are closed.
Movement of food through the oesophagus is due to :
Peristalsis is the rythmic contraction and relaxation of muscles of alimentary canal that propels the food in downward direction.
Oxygen liberated during photosynthesis comes from
Oxygen liberated during photosynthesis comes from split water molecules. During photosynthesis, plants absorb water and carbon dioxide. After the absorption the wate,r molecules are disassembled and convert into sugar and oxygen.
Oxygen released during photosynthesis is derived from
The filtration units of kidneys are called
Each of your kidneys is made up of about a million filtering units called nephrons. Each nephron includes a filter, called the glomerulus, and a tubule.
The common step between aerobic and anaerobic respiration takes place in :
The first step of aerobic respiration as well as anaerobic respiration is same and takes place in the cytoplasm of cells.
When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of
The lime water on reaction with exhaled CO2 forms calcium hydroxide or slaked lime which is milky in color.
Which is the first enzyme to mix with food in digestive tract ?
Salivary amylase, present in saliva, is the first digestive enzyme that gets mixed with food in oral cavity during the process of mastication and bolus formation.
Which part of alimentary canal receives bile from the liver ?
Small intestine receives bile from the liver, which is normally stored in the fall bladder. It performs two functions ie., makes the food alkaline and break the fats present in food into small glodules by the process of emulsification.
In which part of human digestive tract does common bile duct open?
Duodenum is first part of small intestine where common bile duct opens.
Which of the following statements is not correct?
Nephridia are segmentally arranged excretory organs present in earthworms. On the basis of their location, three types of nephridia are found in earthworms.
Which of the following protects inner lining of stomach from hydrochloric acid secreted by gastric glands ?
Mucus is secreted by cells of gastric gland which forms a slimy layer over inner wall of stomach.
Blood pressure is measured by an instrument called
Sphygmomanometer is the instrument used to measure the blood pressure. It is also known as blood pressure meter.
When few drops of iodine were poured on a potato slice, the potato turned blue-black in colour. This indicates that potato contains
Starch test is done by iodine solution which turns colour of starch to blue-black.