Structural organisation in animals practice · Mixed difficulty

In which of the following animals, respiration occurs without any respiratory organ?

Study the following statements
I. It forms the lining of the cavities of alveoli of the lungs
II. It occurs in the ducts of sweat glands
III. It forms the lining of salivary glands and glands
IV. It is a loose connective tissue
Which of the above statements are associated with the simple epithelial tissue

Consider the following statements about Rana tigrina
I. The skin of frog sheds after every few weeks
II. Camouflage is a common defensive mechanism of frog
III. Chest muscles are involved in the process of respiration
IV. Their nervous system consists of a brain, spinal cord and nerves
Which of the above statement is incorrect?

The main function of cells in an epithelium
is to provide protection against chemical
and mechanical stresses. Identify the
epithelium.

The skin of frog acts as …A… in water and on land, the …B…, …C… and …D… acts as respiratory organs. Choose the correct combination in accordance to above statement

The difference between the exocrine and endocrine glands is

Which of the following statement is correct in reference with the frog?
I. Eyes are bulged and covered by nictitating membrane
II. Membranous tympanum receives the sound signals
III. The frog never drinks water
IV. A pair of nostrils is preset above the mouth

Read the following statements.
(i) It is a contractile tissue present only in the heart.
(ii) Cell junctions fuse the plasma membranes of these cells and make them stick together.
(iii) Communication juntions at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbours are also stimulated to contract.
Which of the following type of tissue is being described by the above statements?

Moist surface of buccal cavity show _____epithelium.

Find out the pair in reference to the earthworm, which is not correctly matched

Striated and voluntary muscles occur in

All cells in epithelium are held together with little intercellular material. In nearly all animal tissues, specialized junctions provide both structural and functional link between individual cells. Which of the following junctions facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cell?

Structure which increases the effective area of absorption in the intestine w.r.t. earthworm, is called as

Select the correct statement.

Which of the following statement is/are incorrect Periplanata americana?
I. They are nocturnal omnivores that lives in the damp places
II. Its body is segmented and divisible in two region-head and abdomen
III. Antennae have sensory receptor to monitor the environment
IV. Head can move in all direction due to the presence of movable neck
The correction option is

Cells of areolar tissues that produces or secrete fibres are called

Which of the following statement is incorrect regarding connective tissues?

Earthworm lives in the burrows made by boring and swallowing the soil to

Which of the following statement is incorrect about the female reproductive system of frog? I. Reproductive organs includes a pair of ovaries II. Ovary has functional connections with kidneys III. A mature female can lay 15000-20000 ova at a time IV. Oviduct and ureters open separately into the cloaca

Seggregate the given set of statements regarding frog into true and false category
I. Frogs do not have a lymphatic system
II. Frogs are ammonotelic animals
III. Hindlimbs of frog ends in five digits and forelimbs ends in four digits
IV. Female frog contains sound producing vocal sacs which are absent in male frog

Adjacent cell communicate with each other by which junction :

A: Simple epithelium covers surface exposed to mechanical or chemical abrasions (scraping).

R: Protection of underlying tissue is the major function of simple epithelium.

The frogs have the ability to change its colour to hide them from their enemies. This protective colouration is called

Select the type of gland with its appropriate example.

Abdominal ganglia in cockroach are found in segments

Assertion: Blood is connective tissue
Reason: In blood, cells use to secrete fibres of structural
proteins called collagen or elastin.

Assertion (A): The hollow structure like fallopian tube has columnar cells bear cilia on their free surface.
Reason (R): In fallopian tube the cilia required to move component of fertilization in a specific direction over the epithelium.

Choose the correct option w.r.t. cockroach.

In multicellular animals, a group of $\underline {\,\,\,{\text{A}}\,\,\,}$ cells along with $\underline {\,\,\,{\text{B}}\,\,\,}$ substance perform a $\underline {\,\,\,{\text{C}}\,\,\,}$ function. Such an organization is called _______

The noncellular basement membrane of epithelium is
secreted by