LAB FINALS

Question 1

Stem that is not differentiated into nodes & inter nodes

Answer 1

Reduced stems

Question 2

Lies just above the base of fleshy roots of Radish, Carrot, & turnip

Answer 2

Redeces green disc-like stem

Question 3

Occurs in free floating Lemna, Spirodela and Wolffia

Answer 3

Green small discoid stem

Question 4

Occurs at the base of onion and garlic bulbs

Answer 4

Non-green discoid stem

Question 5

Erect stems with solid nodes and hollow internodes

Answer 5

Culm (ex. babmboo & wheat)

Question 6

The main stem remains unbranched and bears a crown of leaves at its top

Answer 6

Caudex (palm

Question 7

The main stem is trunk like ; thickest at the base

Answer 7

Excurrent

Question 8

The apical bud of main stem is weak as compared to the buds of lateral branches

Answer 8

Decurrent/ Deliquescent (Banyan tree- Ficus bengalensis)

Question 9

Thin, soft & delicate which are unable to remain upright without any external support

Answer 9

Weak stem

Question 10

The stems are long, slender, flexible and very sensitive. They twin or coil around an upright support on coming in its contact due to a special type of growth movement called nutation

Answer 10

Twinners

Question 11

The stem is weak and unable to coil around a support. They usually climb up the support with the help of some clasping or clinging structure

Answer 11

Climbers

Question 12

Thread like structure which help in climbing the plants

Answer 12

Tendril climbers

Question 13

Adventitious roots arise from the nodes and penetrate into the upright support so that the climber climbs uo

Answer 13

Root climbers

Question 14

Weak stemmed plants slowly grow over other bushes and rest there; they attain positions with the help of CURVED prickles

Answer 14

Scramblers or hook climbers

Question 15

Woody perennial climbers found in deep forest. At first they look like twinners but soon they become woody

Answer 15

Lianas

Question 16

The stem creeps on the ground but roots do not arise at the nodes

Answer 16

Trailers

Question 17

Diffuse

Answer 17

Branches grow profusely in all directions

Question 18

Weak-stemmed plants grow prostate and develop adventitious roots from their nodes

Answer 18

Creepers

Question 19

Has alongvinternode and creeps horizontally

Answer 19

Runners

Question 20

Special kinds of runners which initially grow upwards like ordinary branches and then arch down to develop new daughter plants

Answer 20

Stolon

Question 21

Weak, elongated, horizontal branch of one internode that arises in the axil of a leaf. It produces clusters of leaves above and tufts of roots below

Answer 21

Offsets

Question 22

Adv. for underground stem

Answer 22

• Can store plenty of food material
• Well protected from herbivorous animals
  -Can live for a longer time
• can carry out vegetative propagation easily

Question 23

Sub aerial branch that arises from the main stem. It initially grows horizontally below the soil surface and later grows obliquely upward

Answer 23

Sucker

Question 24

Thickened underground dorsiventral stem that grows horizontally at particular depth within the soil.

Answer 24

Rhizome