Choose the correct statements regarding frog's anatomy.
(A) Hepatic portal system is the special venous connection between liver and intestine.
(B) There are twelve pairs of cranial nerves arising from the brain.
(C) The ureters and oviducts open separately into the cloaca in female frogs.
(D) Hind-brain consists of cerebellum, medulla oblongata and optic lobes.
(E) Sinus venosus joins the right atrium of heart.
Choose the correct answer from the options given below:
The hepatic portal system connects the intestine and liver. Female frogs have separate openings of ureters and oviducts into the cloaca. The sinus venosus opens into the right atrium. Frogs have 10 pairs of cranial nerves, and optic lobes belong to the midbrain.
Male frogs can be distinguished from female frogs due to the presence of:
(A) Bulging eyes
(B) Vocal sacs
(C) Webbed digits in feet
(D) Copulatory pad on first digit of fore limbs
(E) Olive green-coloured skin with dark irregular spots
Choose the correct answer from the options given below:
Male frogs possess vocal sacs for mating calls and nuptial (copulatory) pads on the first digit of the forelimbs to hold the female during amplexus.