Structural Organisation in Animals Chapter-Wise Test 2

Frogs undergo external fertilization, where eggs and sperm are released into water for fertilization.

The nictitating membrane covers the frog’s eyes while in water, providing protection.

The thyroid gland in frogs releases hormones that regulate metamorphosis from the tadpole stage to adulthood.

The optic lobes in the frog’s brain process visual information.

During hibernation, frogs rely on cutaneous respiration, where oxygen is absorbed through their moist skin.

The duodenum, the first part of the small intestine, receives bile and pancreatic juices for digestion.

During the tadpole stage, frogs use gills for respiration before developing lungs in adulthood.

The urinary bladder in frogs temporarily stores urine before it is expelled through the cloaca.

Frogs have adrenal glands, but they lack a distinct adrenal medulla like mammals.

Fat bodies in frogs store energy, which is used during hibernation and breeding seasons.