Average life span of human R.B.C is
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Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?
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The grouping of blood is based on substances called
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An individual whose blood type is B may in an emergency, donate blood to a person whose blood type is
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Person having blood group 'B' can donate the blood to person having blood group
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Pyorrhoea is a disease of the
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Plants developing in dry conditions are
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Which of the following carries oxygen to various parts of human body?
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Plants synthesis protein from
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Name the blood cells in which nucleus is absent.
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Red blood corpuscles is also known as
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cientist who discovered blood groups was
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Monocot root differs from dicot root in having
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Ramapithecus and Cro-Magnon man are considered
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The smallest blood vessels which are one-cell thick, are called ________
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Radish is a
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Antigens 'A' and 'B' are absent in persons belong to blood group
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Most abundant tissues of our body are
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Number of chromosomes in down's syndrome is
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Which cell organelles are involved in photosynthesis?
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Placenta is the structure formed
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What carries blood back to the heart?
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Myopia is connected with
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Blood group which have no antibodies
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Pollination by wind is called
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Where is the genetic information of the cell stored?
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Organic Substances which, in very small amounts, control growth and development called
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Our major foods, fibres, spices, fruits and beverage crops are
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Plant have ____ while animals lack it.
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Plant bends towards the source of light on account of the movement of curvature known as
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The largest artery in human body is
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One of the following is not a function of bones.
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Main function of white blood corpuscles is
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Radical vascular bundles are those in which
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Outer covering of virus made up of protein is
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In plants cells,which structure provides a definite shape to the cell and makes it right?
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Pollination is best defined as
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Which one of the following is not an insect:
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Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of
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Plants are killed in winter by frost
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Fully mature human RBCs has
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It consists of an aqueous ground substance containing a variety of cell organelles and other inclusions such as wastes and storage products.
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Volume of blood found in a healthy person is
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Which statement regarding the mammalian heart is correct?
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Ordinary table salt is sodium chloride. What is baking soda?
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The study of structures of organisms, their cells and their organelles at molecular level is known as
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O2 released in the process of photosynthesis comes from
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Normal adult human male has
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In human body lymphocytes are formed in
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Photosynthesis generally takes place in which parts of the plant?
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Movements due to light are shown by
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Lymph carries digested and absorbed fat from ________ .
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Prokaryotic cells lack
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Phloem is a tissue found in
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Our skin, when exposed to excess sunlight, becomes dark. This is because of our skin pigments called
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Blood group which have no antigen
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Plants that grow under average temperature and moisture are called:
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Which among the following is also called as 'power house of the cell'?
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With which of the following body organ is 'pace-maker' associated?
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What is the average Life span of RBC?
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Photosynthesis takes place faster in
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Plants absorb most part of water needed by them through their
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On which of the following plants did Gregor Mendal perform his classical experiment?
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N2 content is kept constant in the biosphere due to
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Where do arteries carry blood?
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Haemoglobin is an important component of
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Blood is red in colour due to the presence of ________
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Plants absorb dissolved nitrates from soil and convert them into
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One of the following is most suitable for study of mutations
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Mutation is
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Human heart is made up of
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Ptyalin is an enzyme produced in the
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Movement of cell against concentration gradient is called
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The normal blood pressure in human beings is
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Purification of blood takes place in
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Radioactivity is a phenomenon of the spontaneous emission of
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Which parts of the heart receive blood from the lungs?
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Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to
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Produces a usable form of energy for the cell
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Ozone hole refers to
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In plants, chloroplasts are necessary for
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Which blood group is a universal recipient?
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Which blood group is universal acceptor?
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Photosynthesis is a process
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The sound lub-dub lub-dub is produced by
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Primary phloem develops from
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Pigmentation of skin is due to
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Process of cell division can take place by
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Nymph is the name of young one of
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Plants hormone that induces cell division is
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Plants growing on sand are called as
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Which blood group is universal donor?
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Pulses are a good source of
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Which of the following blood group is called universal donor ?
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Potato is a modified form (outgrowth) of:
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Life of red blood cells in the body is
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Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes
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Plants wilt due to excess of
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Hemoglobin, the oxygen carrying substance in red blood cells, is a
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Which statement about capillaries is correct?
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Which of the following blood group is universal donor?
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Reflex actions are controlled by :
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It is an oxygen carrying protein of red colour concentrated in red blood cells.
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Photo-oxidation is
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Plants that grow in saline water are called
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Blood pressure is the pressure exerted on the wall of
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The upper chambers of the heart are the
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Number of chamber found in human heart is
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Which of the following blood cells carry oxygen?
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Rain water helps to increase the ____ to some extent.
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Plant development is influenced by
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It is a heredity material and contains the genetic information which is passed on from one generation to another.
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Monotremes are unique mammals because they
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Other than spreading malaria, anopheles mosquitoes are also vectors of
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Prothrombin which helps in clotting of blood is released by
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The universal donor belongs to blood group
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Most highly intelligent mammals are
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Of the following taxonomic categories which is the most inclusive (i.e. is the highest in hierarchy)?
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Pollen grains in plants are produced in
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Nucleus, the genetic material containing rounded body in each cell, was first discovered in 1831 by
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Oxygen in our blood is transported by a protein named
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Night blindness is cause by lack of which vitamin?
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Instrument used to measure blood pressure is
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What carries blood away from the heart?
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Norepinephrine increases
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Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?
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One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?
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Most of the red, blue and purple colours of plants are due to a pigment called
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Where does protein synthesis take place in a cell?
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Out of proteins, lipids and carbohydrates present in a cell membrane, what is true?
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Biotic component of the environment does not include-
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Red colour of blood is due to presence of
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Most fish do not sink in water because of the presence of:
I. swim bladder
II. air bladder
III. air sacs
IV. air in spongy bones
I. swim bladder
II. air bladder
III. air sacs
IV. air in spongy bones
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Mumps is a disease caused by
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Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with
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Poison glands of snakes are homologous to
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In which of the following organelles does photosynthesis take place?
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Neurospora is used as genetic material because
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Plants receive their nutrients mainly from
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