iba sts general science for the post of sst goverment of sindh spsc 2022 jobs
(a) The stem, root, and leaves are the
parts of a plant.
vegetative
reproductivehttps://youtu.be/viNmFxesUIk
characteristic
[vegetative]
(b) The part of the plant that bears the leaves, buds, flowers, and fruits of the plant is
.
Roots
leaves
stem
[stem]
(c) The flat green part of the leaf is called GENERAL KNWOLEDGE
.
petiole
midrib
lamina
[lamina]
(d) Flowers arranged in a group or cluster is called
.
spike
inflorescence
florets
[inflorescence]
(e) Flowers of the wheat plant are arranged in an inflorescence called
.
floret
spike
florets
[spike]
(f) The part of the animal body that contains the sensory organs is called
.
head
trunk
limbs
[head]
(g) Which one of the following animals does not have a hard skeleton?
rabbit
squirrel
jellyfish
[jelly fish]
(h) A hydrostatic skeleton is made up of a
.
solid
liquid
gas
[liquid]
(i) The body of an insect is covered by a hard, water-proof skin called
.
chitin
cuticle
wax
[cuticle]
(j) The skeleton which forms the main axis of the body of a mammal is called
.
appendicular skeleton axial skeleton
exoskeleton
[axial skeleton]
(a) The breaking down of food into liquid form is called
.
digestion
respiration
excretion
[digestion]
(b) The digestion of food in humans takes place inside a long tube called
.
excretory canal
alimentary canal
respiratory canal
[alimentary canal]
(c) Enzymes in the gastric juice in the stomach help to digest
.
proteins
fats
carbohydrates
[proteins]
(d) Bile is produced in the
.
stomach
intestines
liver
[liver]
(e) Digested food is absorbed into the blood by finger like projections called
.
tubes
villi
capillaries
[villi]
(f) Water from the undigested food is absorbed in the
.
colon
small intestine
kidney
[colon]
(g) The process by which food is oxidized to release energy is called
.
digestion
excretion
respiration
[respiration]
(h) Exchange of gases in the body takes place in the
.
lungs
kidneys
stomach
[lungs]
(i) Excess animal fat in the diet leads to the formation of
.
cholesterol
proteins
vitamins
[cholesterol]
(j) Many respiratory diseases like emphysema are caused by
.
sleeping
eating
smoking
[smoking]
(a) are blood vessels that carry blood away from the heart.
Arteries
Veins
Capillaries
[Arteries]
(b) Arteries divide into small thin-walled vessels called
.
veins
villi
capillaries
[capillaries]
(c) Blood vessels that carry blood back to the heart are called
.
arteries
veins
capillaries
[arteries]
(d) The heart is made up of a special type of muscle called
.
muscle fibre
cardiac muscle
intercostal muscle
[cardiac muscle]
(e) Normally the human heart beats about
times in a minute.
40
70
100
[70]
(f) Xylem is the type of vascular tissue through which
are transported.
water and mineral salts
food and salts
water and food
[ ater and mineral salts]
(g) The evaporation of water from the leaves is called
.
respiration
translocation
transpiration
[transpiration]
(h) The transport of food from the leaves to all parts of the plant is called
.
respiration
translocation
transpiration
[translocation]
(i) When is the rate of transpiration fastest?
On a bright sunny day
At night
On a rainy day
[On a bright, sunny day]
(j) Translocation is the movement of
in the phloem.
water
food
oxygen
[food]
(a) The increase in the size of an organism is called
.
growth
reproduction
elongation
[gro th]
(b) Growth in plants takes place at the
of the root and shoot.
sides
tips
base
[tips]
(c) The type of reproduction in which there is only one adult of the species is called
.
sexual reproduction
asexual reproduction
fission
[asexual reproduction]
(d) Yeast is a simple non-green plant that reproduces by
.
cuttings
tubers
budding
[budding]
(e) The process by which pollen from the anther is carried to the stigma of a flower is called
.
fertilization
germination
pollination
[pollination]
(f) The process of the joining of male and female cells is called
.
fertilization
germination
pollination
[fertilization]
(g) Pine trees produce male and female reproductive organs called
.
fruits
seeds
cones
[cones]
(h) The process by which the embryo of a seed grows into a new plant is called
.
germination
pollination
fertilization
[germination]
(i) The scattering of seeds away from the parent plant is called
.
dispersal
pollination
fertilization
[dispersal]
(j) When a seed is planted in the soil it absorbs water through the
.
testa
micropyle
cotyledon
[micropyle]
(a) Things which affect the way of life of an organism are called
.
habitat
environment
community
[environment]
(b) Which one of the following animals is warm-blooded?
Fish
Frog
Squirrel
[Squirrel]
(c) Which one of the following is not an adaptation of desert plants?
Thick stem
Deep roots
Air spaces in the leaves
[Air spaces in the leaves]
(d) An adult frog breathes through its
.
lungs
gills
fins
[lungs]
(e) The body of a bird is covered with
.
hair
scales
feathers
[feathers]
(f) Animals that eat both plants and animals are called
.
herbivores
carnivores
omnivores
[omnivores]
(g) Many food chains are inter-connected to form a
.
food cycle
food chain
food web
[food eb]
(h) The position of an organism in a food chain is called its
.
water level
trophic level
tropic level
[trophic level]
(i) At the base of every food chain, green plants are the
.
producers
consumers
decomposers
[producers]
(j) Bacteria and fungi which break down the bodies of dead plants and animals in the soil are called
.
scavengers
decomposers
carnivores
[decomposers]
(a) The boiling point of pure water in degrees Centigrade is
.
0
50
100
[100]
(b) Green plants need water for
.
digestion
respiration
photosynthesis
[photosynthesis]
(c) Water becomes hard due to the presence of dissolved
.
Sand
rock
chemicals
[chemicals]
(d) Chlorine is added to water in a water purification plant to
.
kill germs
remove hardness
filter it
[kill germs]
(e) What percentage of water covers the Earth?
.
50%
75 %
100 %
[75%]
(f) The purest form of water is
.
drain water
sea water
rain water
[rain
ater]
(g) Unwanted and harmful substances in the water cause
.
air pollution
water pollution
land pollution
[ ater pollution]
(h) Which kind of pollution is harmful for marine life in the sea?
.
Oil pollution
Air pollution
Land pollution
[Oil pollution]
(i) The movement of water between the sea, the land, and the atmosphere is called
.
hydrogen cycle
oxygen cycle
water cycle
[ ater cycle]
(j) Water can be purified in the laboratory by a process called
.
filtration
distillation
evaporation
[distillation]
(a) The nucleus of an atom contains
.
electrons and neutrons
protons and electrons
protons and neutrons
[protons and neutrons]
(b) Electrons in an atom have
.
a positive charge
negative charge
no charge
[negative charge]
(c) The number of protons in an atom is called
.
atomic number
mass number
electronic number [atomic number]
(d) The number of electrons in an atom is
the number of protons.
greater than
equal to
less than
[equal to]
(e) A molecule is composed of two or more
.
electrons
protons
atoms
[atoms]
(f) A compound is formed when two or more atoms are combined
.
physically
chemically
electronically
[chemically]
(g) Isotopes are
atoms of the same element.
heavier
lighter
equal
[heavier]
(h)
is the combining power of an atom.
Tendency
Valiancy
Accuracy
[Valiancy]
(i) The name of a chemical compound written in symbols is called
.
chemical equation
chemical reaction
chemical formula
[chemical formula]
(j) We can find out the
of a compound by the number of atoms and their ratios.
formula
name
valiancy
[formula]
(a) A change in which no new chemical substance is formed is called
.
physical change
chemical change
ion exchange
[physical change]
(b) A
change can be easily reversed.
chemical
physical
ionic
[physical]
(c) A
change is a permanent change.
physical
chemical
reversible
[chemical]
(d) A
reaction can easily be changed back.
reversible
irreversible
chemical
[reversible]
(e) Chemicals which are needed by plants for their proper growth are called
.
nutrients
food
fertilizers
[fertilizers]
(f) A synthetic material made from polymers is called.
.
rubber
wood
plastic
[plastic]
(g) Crude oil and natural gas are called
.
fossil fuels
natural fuels
synthetic fuels
[fossil fuels]
(h) Fossil fuels have been made from the
that were on the Earth millions of years
ago.
bodies of plants and animals
rocks and soil
water and mud
[bodies of plants and animals]
(i)
are organic compounds made up of carbon, hydrogen, and oxygen.
Fats
Plastics
Glass
[Fats]
(j) Electrical fittings are made of a plastic called
.
melamine
nylon
Bakelite
[Bakelite]
(a) The transfer of heat energy by the vibration of particles is called
.
conduction
convection
radiation
[conduction]
(b) The particles in the hotter region move to the colder region when heat energy travels by
.
conduction
convection
radiation
[convection]
(c)
are better conductors than fluids.
Solids
Liquids
Gases
[Solids]
(d) Which one of the following is the best conductor of heat?
Copper
Glass
Air
[Copper]
(e) Heat travels from one end of an iron rod to the other end by
.
conduction
convection
radiation
[conduction]
(f) Water is a
conductor of heat.
good conductor
bad conductor
bad insulator
[bad conductor]
(g) Liquids and gases are
of heat.
good conductors
poor conductors
bad insulators
[poor conductors]
(h) Hot air moves
.
downwards
upwards
forwards
[up ards]
(i) Which one of the following statements is wrong?
Convection can take place in a liquid.
Convection can take place in a vacuum.
A convection current can be present in gas.
[Convection can take place in a vacuum.]
(j) The sun heats up the Earth by
.
conduction
convection
radiation
[radiation]
(a) The bending of light waves when passing from a one transparent medium to another is called
.
reflection
refraction
dispersion
[refraction]
(b) When a ray of light passes from a rarer to a denser medium it bends
from the
normal.
away
towards
like a wave
[to ards]
(c) The angle which the incident ray makes with the medium is called the angle of
.
incidence
refraction
reflection
[incidence]
(d) The ratio of the speed of light in air to the speed of light in a medium is called
index.
reflective
refractive
objective
[refractive]
(e) The size of the angle of incidence at which the refracted ray runs parallel to the surface of the
medium is called
.
angle of incidence
angle of refraction
critical angle
[critical angle]
(f) Very thin fibres of glass through which light can pass are called
.
fibre glass
fibres
optical fibres
[optical fibres]
(g) The splitting of light when it passes through a prism is called
.
refraction
reflection
dispersion
[dispersion]
(h) Red, blue, and green are called
colours.
primary
secondary
plastic
[primary]
(i) Cyan, magenta, and
are secondary colours.
blue
green
yellow
[yellow]
(j) Objects appear coloured because they reflect or
some of the colours of the
spectrum.
absorb
disperse
refract
[absorb]
(a) The regular to and fro movements of a swinging body are called
.
waves
oscillations
movements
[oscillations]
(b) The time taken for one complete oscillation is called
.
period
wave
requency
[period]
(c) The number of oscillations completed in one second is called
.
frequency
period
wave
[frequency]
(d) Frequency is measured in
.
seconds
hertz
ohms
[hertz]
(e) The loudness of sound produced by a vibrating body depends on its
.
amplitude
oscillations
frequency
[amplitude]
(f) Waves that travel perpendicular to the direction of the oscillations are called
.
longitudinal waves
transverse waves
vibrations
[transverse
aves]
(g) Sound waves are
waves.
transverse
longitudinal
horizontal
[longitudinal]
(h) A small drum will produce a
sound than a big one.
louder
softer
shriller
[softer]
(i) Humans can hear sound of frequencies between
.
50 to 20,000 Hz
500 to 50,000 Hz
500 to 66,000 Hz
[50 to 20,000 Hz]
(j) Wavelength is the distance between two
.
waves
wavefront
oscillations
[ avefronts]
(a) Electrons that can move from one place to another are called
.
positive electrons
negative electrons
free electrons
[free electrons]
(b) A non-metal which can conduct electricity is
.
copper
gold
coal
[coal]
(c) Materials which allow electricity to pass through them are called
.
insulators
conductors
semiconductors
[conductors]
(d) A device to open and close a circuit is called a
.
switch
fuse
circuit
[s itch]
(e) A fuse wire has a
.
low melting point
high melting point
[lo melting point]
(f) Materials which allow electricity to pass through them when hot are called
.
conductors
semiconductors
insulators
[semi-conductors]
(g) A simple circuit needs a source of electricity such as a
.
fuse
bulb
battery
[battery]
(h) Insulators can be charged by rubbing because
.
electrons can flow through them
electrons cannot flow through them
[electrons cannot flo through them]
(i) When electrons are forced to move in a particular direction, they produce
.
a conductor
an insulator
an electric current
[an electric current]
(j) Which one of the following materials is a semiconductor?
carbon
silicon
plastic
[silicon]
(a) Space and all the things in it make up the
.
world
solar system
universe
[universe]
(b) The big bang theory suggests that the universe was contained in a primitive atom called
.
nuclear atom
primordial atom
electronic atom
[primordial atom]
(c)
are balls of hot glowing gases.
Stars
Comets
Meteors
[Stars]
(d) Bright stars which join up to make patterns in the sky are called
.
galaxies
constellations
nebulae
[constellations]
(e) A huge mass of stars which may be spiral or elliptical is called
.
great bear
pole star
galaxy
[galaxy]
(f) Giant stars which have shrunk, but give off bursts of energy are called
.
constellations
pulsars
quasars
[pulsars]
(g)
are great clouds of gases and dust in space.
Nebulae
Comets
Pulsars
[Nebulae]
(h) Stars may have formed in
.
nebulae
solar system
clouds
[nebulae]
(i) Stars that have grown old are called
.
white dwarfs
black holes
quasars
[ hite d arfs]
(j) Our
is a star that is part of the Milky Way Galaxy.
Moon
Sun
Earth
[Sun]
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