Biology - general knowledge
Plants absorb dissolved nitrates from soil and convert them into
Pollination is best defined as
transfer of pollen from anther to stigma
germination of pollen grains
growth of pollen tube in ovule
visiting flowers by insects
Myopia is connected with
None of these
Plants are killed in winter by frost
because of desiccation and mechanical damage to the tissues
because no photosynthesis takes place at such low temperature
because respiration ceases at such low temperature
because there is no transpiration
a factor responsible for plant growth
a change which affects the offspring of F2 generation only
a change that is inherited
a change which affects the parents
One of the following is not a function of bones.
Place for muscle attachment
Protection of vital organs
Secretion of hormones for calcium regulation in blood and bones
Production of blood corpuscles
Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called
Other than spreading malaria, anopheles mosquitoes are also vectors of
out of proteins, lipids and carbohydrates present in a cell membrane, what is true?
Lipids are maximum
Carbohydrates are minimum
Carbohydrates are maximum
All three are in equal proportion
Of the following taxonomic categories which is the most inclusive (i.e. is the highest in hierarchy)?
Organic Substances which, in very small amounts, control growth and development called
None of the above
On which of the following plants did Gregor Mendal perform his classical experiment?
Pigmentation of skin is due to
Photosynthesis takes place faster in
light and oxygen induced breakdown
All of the above
Plant bends towards the source of light on account of the movement of curvature known as
Most common disease of poultry in India is
Plants absorb most part of water needed by them through their
zone of elongation
Radioactivity is a phenomenon of the spontaneous emission of
protons (alpha particles)
electrons (beta particles)
gamma rays (short wave electromagnetic waves)
All of the above
Rain water helps to increase the ..... to some extent.
Most of the red, blue and purple colours of plants are due to a pigment called
Question 21 Explanation:
Anthocyanin - A blue, violet, or red flavonoid pigment found in plants.
Plants synthesis protein from
Night blindness is cause by lack of which vitamin?
Plants that grow in saline water are called
Photosynthesis generally takes place in which parts of the plant?
Leaf and other chloroplast bearing parts
stem and leaf
Roots and chloroplast bearing parts
Bark and leaf
O2 released in the process of photosynthesis comes from
Plants that grow under average temperature and moisture are called
Plants hormone that induces cell division is
Pollen grains in plants are produced in
Movements due to light are shown by
all land plants
all the plants
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
Mumps is a disease caused by
None of these
There are 33 questions to complete.