What material is the exoskeleton of the cockroach made of?

Hepatic portal system and Renal portal system are present in the frog.

What is exchanged during mating in earthworms?

Crop in cockroach is used to grind the ingested food. True or false?

Which of the following tissues has the most regenerative power?

Cartilage is the main tissue that provides the structural frame to the body.

Where is brush bordered cuboidal epithelium found?

Which of the following do not contain ciliated epithelium?