Question

In Ascaris, eggs are fertilized in the
A. Vagina
B. Oviducts
C. Lower parts of uteri
D. Seminal vesicles

Answer 1

Hint: Aschelminthes belongs to the kingdom Animalia.
They show tissue or organ level of organization.
They are pseudocoelomate which means they contain false coelom but that substance will act like a coelom. They are also known as Roundworms.

Complete answer:
- Aschelminthes are also known as Roundworms because their body is circular in cross section.
- They have an organ level of organization.
- They are bilaterally symmetrical, triploblastic in nature and are pseudocoelomates.
- Alimentary canal is complete with well developed muscular pharynx.
- An excretion is through excretory pores.
- Sexes are dioecious which means male and female are distinct.
- Females are often longer than males.
- When the infective egg of ascaris enters into the human body through the food produced in contaminated soil.
- When the larva hatches inside the body it invades the intestinal mucosa and transfers to the lungs through the portal and then systemic circulation.
- The larva matures in alveoli and again migrates to the intestine where it develops into the adult and releases fertilized egg in the lower part of the intestine which passes through faeces.
- They are the first phylum of kingdom animalia which shows sexual dimorphism, circular and longitudinal muscles, and complete digestive system.

Hence, The correct answer is option (C).

Note: Phylum Annelida: They are aquatic or terrestrial, free living and sometimes parasitic. They exhibit organ level of organization, having bilateral symmetry
They are metamerically segmented and coelomate animals.
A proper excretory system is present known as Nephridia.
Neural system consists of paired ganglia which are connected by lateral nerves to a double ventral nerve cord.