Which of the following is correct regarding respiration in adult frog
In water- Skin, gills
On land - Skin, buccal cavity
In water- Skin, buccal cavity
On land- Skin, lungs, gills
B.
On land - Skin, buccal cavity
In frog three types of respiration occurs to suit its amphibious mode of life. These are cutaneous, buccopharyngeal and pulmonary respiration. Cutaneous respiration occurs through the thin, moist, highly vascular and naked skin. It takes place in water as well as on land. Buccopharyngeal respiration occurs on land via thin, vascular, moist lining of buccopharyngeal cavity. Pulmonary respiration takes place when the frog is outside the water. It occurs by lungs of adult frog.
Select the incorrect statement.
Periplaneta has compound eyes.
Earthworm shows segmentation.
Ascaris shows sexual dimorphism.
Liver fluke has a complete alimentary canal
Assertion : In Pleurobrachia, eight comb like ciliary plates called comb plates are present on the body that help in locomotion.
Reason : Pleurobrachia reproduces sexually and its life cycle includes cydippid larva.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Stinging capsules (nematocysts) are found in
wasp and honeybee
scorpion and cobra
sea pen and sea fan
cactus and Venus flytrap
Refer the given figure of digestive system of earthworm and identify the part labelled X.
Intestinal caecae
Typhlosole
Gizzard
Pharynx.
Assertion: Blood in cockroach is colourless haemolymph with no respiratory pigment.
Reason: Respiration in cockroach occurs through diffusion in haemolymph.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: Branchiostoma and Balanoglossus are bilaterally symmetrical and triploblastic animals.
Reason: They are exclusively marine and possess notochord.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
One of the world's most poisonous fish toxins is released by
clown fish
eel fish
sword fish
puffer fish
Assertion: Cephalisation is advantageous to an animal.
Reason: It improves the appearance of the animal.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Choose the correct pair
Coconut, cucurbits - dioecious
Honeybee, Rotifers - parthenogenesis
Ornithorhyncus, Whale - viviparity
Frog, Peacock - external fertilisation
