BIOLOGY [5 Mark Question Answer]

Group to which it Belongs :
Protista
Where it lives : Every where mostly in water Two other members of the same group :
Paramecium euglena One characteristic feature of the group : They are made up of a single cell
Group to which it Belongs :Poriferans
Where it lives : Salty sea water
Two other members of the same group : Sycon,Spongilla
One characteristic feature
of the group : Have pores all over the body
Group to which it Belongs : Arachnids
Where it lives : Any warm habitat
Two other members of the same group: Scorpions, ticks One characteristic feature of the group : Have four pairs of legs
Group to which it Belongs : Cnidarians
Where it lives : Marine water Two other members of the same group : Hydra, Sea Anemone One characteristic feature of the group : Tentacles are used to capture prey Group to which it Belongs :
Molluscs Where it lives : Mostly in water
Two other members of the same group : Octopus, squid One characteristic feature of the group: Soft body with an external hard shell

Four characteristics of reptiles are :
a. They are cold blooded vertebrates.
b. They have dry skin covered with scales.
c. They lay eggs that have leathery shells.
d. They breathe through lungs.
e. g. : Lizard, crocodile.

Two characteristics of:
a. Birds :

• They are warm blooded animals with feathers on their body.
• They have homy beak and do not have teeth.

b. Amphibians:

• They are animals which can live both on land and in water.
• They breathe through lungs and skin.

c. Reptiles :

• They are land animals with dry scaly skin on their body.
• They breathe through lungs.

d. Mammals:

• They are warm blooded animals with hair on their body.
• They give birth to babies and are the only animals that produce milk for nourishing their young ones.

Arthropods are inverteberates with joined legs, segmented body and bilaterally symmetrical body which is divided into head, thorax and abdomen. Anthropods are further classified into –

• Arachnids – They have fused head and thorax, four pairs of legs, hard exoskeleton, no wings and antennae. Examples : Scorpions and spiders.
• Crustaceans – They have fused head and thorax, appendages on all segments, variable number of jointed legs and two pairs of antennae extending from the head. Examples: lobsters and shrimps.
• Myriapods – Body divided into large number of segments and have two pairs of legs per segment (example: millipede) or one pair of legs per segment (Example : centipede). Number of legs may vary from 20 to 200.
• Insects – Their body is divided into head, thorax and abdomen. They have three pairs of legs, two pairs of wings (some have one pair or none) and a pair of antennae. Examples : ants and butterflies.

a. Their body is covered with feathers.
b. Forelimbs are modified into wings to fly.
c. They have a homy beak with no teeth.
d. They lay eggs.
e. They have mammary glands i.e. they suckle their babies.
f. They have hollow bones.
Mammals :
a. They have hair on their body.
b. Forelimbs exist as hand, paw or hooves.
c. They have a mouth with teeth.
d. They give birth to young ones.
e. They don’t have mammary glands.
f. They have solid bones.
g. e.g. Crow, parrot. & e.g. Humans, dog.