Question

 

23-What does the blastopore in the embryo of a butterfly become?

Group of answer choices

1-skin

2-mouth

3-central nervous system

4-anus

 

 

 

24-You discover a new insect species and it has the following characteristics:

A) Four wings, where the forewings are “married” by hooks to the hind wings

B) Chewing mouthparts

C) The animal goes through complete metamorphosis.

Which Order does this insect belong to?

Group of answer choices

1-hymenoptera

2-coleoptera

3-diptera

4-lepidoptera

Answer 1

23) The blastopore in the embryo of a butterfly become :-

(b) Mouth

Butterfly belongs to phyllum Arthropoda which are Protostomes that is blastopore develops into mouth with the second opening develop into anus*.

The blastopore either can develop into mouth or anus*. In deuterstome blastopore develops into anus* but in protostome it develops into mouth.

So the correct answer is (2) Mouth.

24) The insect species discovered has the following characteristics :-

? Four wings, where the forewings are “married” by hooks to the hind wings.

?Chewing mouthparts

?The animal goes through complete metamorphosis.

(a) Hymenoptera

• Characteristic feature is that the hind wings are attached to forewings by series of hooks. And these insects have "married wings" during flight.
• Their mouth parts are adapted to chewing with well developed mandibles.
• They show complete metamorphosis which includes four life stages :- egg, larve, pupa and adult.

Other options are incorrect as :-

? In Coleoptera the forewings are not connected by hooks with hind wings.

?In Diptera there are only two wings.

?In Lepidoptera the feeding habit is mostly sucking type as they donot have mouth parts for chewing.

Thus the correct answer is (1) Hymenoptera.