The similarity between Ascaris lumbricoides and Anopheles stephensi is:
1. Sexual dimorphism
2. Metamerism
3. Anaerobic respiration
4. Endoparasitism

Given below are four matchings of an animal and its kind of respiratory organ:
 

The correct matchings are:

1. A and D

2. A, B, and C

3. B and D

4. C and D

Which one of the following is a matching pair of an animal and a certain phenomenon it exhibits:

1. Pheretima – Sexual dimorphism

2. Musca – Complete metamorphosis

3. Chameleon – Mimicry

4. Taenia – Polymorphism

In Arthropoda, the head and thorax are often fused to form a cephalothorax, but in which one of the following classes, is the body divided into head, thorax, and abdomen?

1. Myriapoda

2. Crustacea

3. Arachnida and Crustacea

4. Insecta