Question

Find the odd one out and give reason--
a) Mycelium ,  sporangium,  nephridia, spores .

b) Gills , two chambered heart, feathers , fins.

c) Horse , cow , frog, elephant ​

Answer 1

Answer:

a) nephridia

Reason- Nephridia is a special organ for the excretion whereas mycelium, sporangium and spores are the parts of a mould.

b) feathers

Reason- Feathers are the part of the wings of birds whereas gills, two chambered hearts and fins are the parts of fishes.

c) Frog

Reason- Frog is an amphibian whereas horse, cow and elephant are mammals.

I hope this helps you

Answer 2

nephridia will be the odd one out in the first question.

• Nephridia is an excretory organ.
• While, Mould comprises of Mycelium, sporangium, spores.

feathers will be the odd one out in the second question.

• Feathers are parts of wings which allows birds to fly.
• While, Gills, Two chambered heart and fins are organs of fishes.

frog will be the odd one out in the third question.

• Frogs Belong to the amphibian group, i.e. small vertebrates that need water or moist environment.
• While, Horse, Cow and Elephant belong to the mammals group, i.e. a group of vertebrate animals constituting the class Mammalia .
• Humans also fall in this category.