Which of the following statement correctly defines a tissue?

(1) A group of cells having different anatomy can perform a specific function.

(2) An aggregate of similar cells forming a definite kind of structure performing a specific function.

(3) Single cell which has ability to perform specific functions in association with other cells.

(4) Two or more organs having similar cells perform similar functions in association with each other.

What is the association of two or more organs interacting physically or chemically to perform a particular function called as :

(1) Tissue-organ system

(2) Organ system

(3) Cellular-tissue system

(4) Animal tissue

Which among the following organs possess all the four types of tissue?

(1) Skin

(2) Stomach

(3) Heart

(4) Fallopian tubes

Assertion (A): Hibernation during winter and aestivation during summer is seen in frogs.

Reason (R): Frogs are poikilotherms.

(1) Both A and R are true and R is the correct explanation for A.

(2) Both A and R are true both R is not the correct explanation for A.

(3) A is true and R is false.

(4) A is false and R is true.

Find the incorrect match
1. Bufo- Toad
2. Rana- Frog
3. Hyla- Tree frog
4. Rana- Common toad

The outermost layer of the skin of the frog is made of:

1. Stratified squamous keratinized epithelium

2. Stratified squamous non keratinized epithelium

3. Simple squamous cpithelium

4. Simple columnar epithelium

Regarding skin of the frog, incorrect statement is:

1. It is made of the epidermis and the dermis

2. Mucous glands are present in the dermis and open at the surface

3. It is soft, moist and slimy

4. It is covered by scales

Mucus helps a frog in forming

1. Thick skin

2. Dry skin

3. Smooth skin

4. Moist skin

The biological adaptation that allows frogs to obtain water for their survival during conditions of water scarcity is the

Frogs can protect itself from enemies by

1. Clawed toes

2. Spiny skin

3. Camouflage

4. Sharp teeth