Home
Class 12
BIOLOGY
Q.) "" is a couple of layer thick, made ...

Q.) `"______"` is a couple of layer thick, made of narrow, thin walled and nearly rectangular cells. It cuts dervatives on both sides. The outer cells differentiate into `"_____"` or `"______"` while the inner cells differentiate into `"______"` or `"_______"`. The three together is called `"_______"`
Select the right sequence of words to complete the above given paragraph.

A

Phellogen , cork , phellem , secondary cortex , phelloderm , periderm

B

Phellem , phelloderm , cork , secondary cortex , phellogen , periderm

C

Phellogen , cork , periderm , secondary cortex , phellem , phellem

D

Phellem , secondary cortex , periderm , cork , phellogen , phelloderm

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

Several genes called ____ have been identified in normal cells which when activated will turn into ___, and under certain conditions, could lead to cancerous transformation of the cells. Complete the above paragraph by selecting correct sequence of words.

Fill the blanks in the given statements and select the correct option A. The developmetnal stage of an animal passed in the mother's womb is called (i).____ (ii). The outer layer of blastula is called (ii). _____. It does nt take part in the formation of (iii). ______ C. (iv)._____ is the first germ layer formed from the inner cell mass by differentiation.

Read the following statements with respect to dicot stem and select the right choice . i. The epidermis is covered with a thick layer of cuticle . ii. The cells of endodermis are rich in starch grains. iii. The pericycle is present on the inner side of endodermis and above the phloem in the of semilunar patches of sclerenchyma. iv. The vascular bundles are arranged in a ring .

Four large metallic plates of area A each are kept parallel to each other with a small separation between them as shown in the figure. A cell of emf V is connected across the two outermost plates through a switch K_(1) . The two inner plates are similarly connected with a cell of emf 2 V through a switch k_(2) Initially both switched are open and the plates, starting form left to right (i.e. number 1 to 4) are given charges Q, 2 Q, - 2Q and - Q respectively. Now answer the following questions The charge appearing on the outer surface of plate -1, when switches K_(1), K_(2) are open

What words will correct fill (a) , (b),(c) and (d) in the following paragraph ? (a) developed into a pollen grain. The outer layer is (b) and inner layer is intine . The inner layer is made up to cellulose and ( c) .In 60% of the angiosperms, pollen grains are shed at (d) celled stage .

Identify the statements as true(T) or false(F). A. Xylem fibres are the components of xylem in all categories of vascular plants. B. Advanced angiosperm families like Winteraceae & Trochodendraceae do not have vessels. C. Sieve tubes & companion cells are ontogenetically related & are called sister cells. D. The cytoplasm of a mature sieve tube occurs in the form of a thin-living layer along the inner side of cell walls.

Complete the following paragraph by selecting the correct option for the blanks A,B and C. The thymus gland is located between the lungs behind the sternum on the ......A.... Side of the aorta. .....B..... Secreted by the gland plays a major role in the differentiation of T- lymphocytes which provide ......C...... They also promote antibody production which provides.....D.... (a) A: dorsal , B : Thymic humoral factor , C : humoral immunity , D : Cell - mediated immunity (b) A: Ventral , B : Thymopoietin , C: humoral immunity , D : cell - mediated immunity (c) A: Ventral , B : Thymopoietin , C: humoral immunity , D : cell - mediated immunity (d) A: Ventral , B : Thymosin , C: cell - mediated , D : humoral immunity