(i) ... a ... help in maintaining pressure gradient in sieve tubes (ii) Stomata regulate process of

English

Gujarati

Hindi

6.Anatomy of Flowering Plants

medium

$(i)$ The ...$a$... help in maintaining the pressure gradient in the sieve tubes

$(ii)$ Stomata regulate the process of ....$b$..... and gaseous exchange

A

$a$ - Tracheids,$ b$ - Transpiration

B

$a$ - Companion cells, $b$ - Transpiration

C

$a$ - Companion cells, $b$-$CO_2$ concentration

D

$a$ - Vessels, $b$ - Transpiration

Solution

Solution is Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Standard 11

Biology

Share

Similar Questions

What is the difference between lenticels and stomata ?

easy

Sclerenchyma usually_ and __ protoplasts.

easy

(AIIMS-2014)

Match the following

Column$-I$ Column$-II$

$(a)$. Hypodermis in dicot stem $(i)$ Absent

$(b)$. Pericycle in dicot stem $(ii)$ Parenchymatous

$(c)$. Ground tissue in monocot stem $(iii)$ Collenchymatous

$(d)$. Phloem parenchyma in monocot stem $(iv)$ Sclerenchymatous

medium

In old trees the greater part of secondary xylem is dark brown and resistant to insect attack due to:

$(a)$ secretion of secondary metabolities and their deposition in the lumen of vessels.

$(b)$ deposition of organic compounds like tannins and resins in the central layers of stem.

$(c)$ deposition of suberin and aromatic substances in the outer layer of stem.

$(d)$ deposition of tannins, gum, resin and aromatic substances in the peripheral layers of stem.

$(e)$ presence of parenchyma cells, functionally active xylem elements and essential oils.

Choose the correct answer from the options given below:

hard

(NEET-2022)

The cross-section of a plant material showed the following features when viewed under the microscope.

$(A)$ The vascular bundles were radially arranged.

$(B)$ Four xylem strands with exarch condition of protoxylem.

To which organ should it be assigned?

medium