Classify Ascaris lumbricoides and distinguish between male and female, and describe the head of a hookworm.

Here are the answers to the questions:

2. Classify Ascaris lumbricoides
Phylum: Nematoda
Class: Secernentea
Order: Ascaridida
Genus: Ascaris

3. Distinguish two differences and similarities each between the two sexes of Ascaris provided.

Differences:

Male	Female
1. Posterior end is curved ventrally with copulatory spicules.	1. Posterior end is straight and conical.
2. Generally smaller in length (2-4 mm diameter, 15-30 cm long).	2. Generally larger in length (3-6 mm diameter, 20-49 cm long).

Similarities:

1. Both sexes possess a cylindrical, unsegmented body covered by a tough cuticle.
2. Both sexes have a complete digestive system, including a mouth, pharynx, intestine, and anus.

4. Hookworm is a soil transmitted nematode, living in the intestine of man. Draw the head of the worm showing the recurved teeth from the provided specimen.

A drawing cannot be provided in this format. However, the head of a hookworm (specifically Ancylostoma duodenale) is characterized by a large buccal capsule (mouth cavity) armed with two pairs of prominent, recurved ventral teeth. These teeth are used to attach to the intestinal wall of the host and feed on blood.