Question

Upper lip and nose is prolonged to form proboscis in
a. Giraffe
b. Tapir
c. Horse
d. ASS

Answer 1

Hint: Proboscis is nothing but the prolonged appendage which extends from the face of the animal, generally it is useful for feeding like sucking, and it is present in both vertebrates and invertebrates, whereas in the vertebrates it is referred to as nose or snout.

Complete answer:
- The proboscis is usually found in both the vertebrates and invertebrates.
- There are a lot of uses with the proboscis and one can consider it as an adaptive change.
- When coming to the invertebrates, mainly they are used for the tubular feeding and the sucking and for this example are insects.
- An example of invertebrates having the proboscis is the mouth parts of the Lepidoptera, mainly they are useful for sucking.
- Mouthparts of Lepidoptera are the best example of proboscis and it is mainly useful for sucking.
- The mouthparts consist of two tubes like structures which are connected to each other, but they are separate for cleaning.
- The tubes are concave from the inside and form the cylindrical in shape and helpful for sucking.
- When coming to the vertebrates, the best example for the proboscis is the elephant.
- In some monkeys also, there is a presence of proboscis.
- A tapir is one of the classic examples, it is used for its proboscis during feeding of shoots and plants and it is also used in locomotion and its proboscis is very flexible.

Hence, The correct answer is option (B).

Note: Tapirs are the only living vertebrates, which are found to possess the true proboscis and they are considered to be formed by the joining of the material and upper labial structures and they are mainly used to grasp food.