Plants grown in darkness show
stout stem
long internodes
bigger leaves
no growth at all
Correct Answer :
B. long internodes
Related Questions
Which among the following is a balanced fertiliser for plants?
Urea
Ammonium Sulphate
Nitrates
Compost
One of the following disease cannot be prevented by the DPT (triple-antigen) immunization of children.
Tetanus
Tuberculosis
Whooping cough
Diphtheria
Genes are arranged in chromosomes
In clusters
In binary fashion
In linear fashion
Scattered
Which among, the following is a solid lubricant?
carbohydrate
graphite
protein
starch
Waldeyer gave the name
microsome
chromosome
ribosome
lysosome
Which one is called anti-haemorrhagic vitamin?
A
C
E
K
Leafy trees help in preventing
Land pollution
Water pollution
Noise pollution
Air pollution
Total number of amino acids in plants is
10
20
30
Plenty
Which among the following cows give maximum milk yields?
Jersey
Holstein
Red Sindhi
Sahiwal
The acid that is secreted in the stomach is
HCI
H2SO4
H2CO3
HNO3
Blood is
acidic
alkaline
neutral
like a buffer
Wallace's line is a line
drawn by Darwin
across the mountains
between two zoo-geographical areas
between different classes of animals
The function of a cell wall is
to give definite shape to the cell
to provide mechanical strength and protection to the cell
to prevent the cell from desiccation
All the above
The natural defence of our body against foreign germs is formed by
red corpuscles
white corpuscles
platelets
lymph
The external ears of man are intended for
ornaments
scattering sound waves
collect sound waves
beauty
Green plants In the sea are useful for respiration of flash because they
release oxygen
release carbon dioxide
release oxygen and carbon dioxide simultaneously
take oxygen and give out carbon dioxide
The drug Ergot is obtained from
Alga
Fungus
Bacteria
Virus
Dwarf plants can be made to attain their normal stature by applying
IAA
Ethylene
Gibberelins
Cytokinins
Hydrotropism means the growth of roots
away from water
towards water
into water
out of water
Which of the following is a good and rich source of vitamin 'C'?
Milk
Radish
Mango
Lemon Juice
The bone cells are connected with each other by
Haversian canal
canaliculi
capillaries
matrix
The development of new organs is termed
Parthenogenesis
Morphogenesis
Histogenesis
Paedogenesis
Mouth and foot diseases in cattle are caused by
Bacteria
Virus
Fungi
Pennicilium
The metallic part of haemoglobin is
copper
molybdenum
nickel
iron
The rate of heartbeat is accelerated by the hormone
adrenaline
acetylcholine
thyroxine
pituitrin
Pacemaker is the
Sinu-auricular node
Auriculo-ventricular node
Bundle of His
Purkinje fibres
Lymphocytes are manufactured by
bone marrow
spleen
liver
lymph nodes
Lamarck's theory of inheritance of acquired characters was challenged by
August Weismann
Hugo de Vries
Herbert- Spencer
Carl Linnaeus
If a father has blood group A and the mother has blood group 0, which one of the blood groups may be found in their progeny?
A
AB
O
Both (a) and (c)
Tetrodotoxin is a potent poison that
erodes blood vessels
blocks conduction of nerve impulses causing respiratory paralysis
produces damage to the kidneys
produces intestinal bleeding