General
✓✗The intercalary meristem produces
- secondary growth
- primary growth
- cork
- wood
General
✓✗In a dicot stem, the hypodermis gives
- mechanical strength to the young stem
- water conduction
- protection by cork formation
- food conduction
General
✓✗Heartwood
- is the oldest secondary xylem
- lies towards the centre (pith side) of the stem
- is non-functional in conduction
- all of these
General
✓✗Which of the following stores food in the form of starch or fat and also substances like tannins?
- Xylem parenchyma
- Xylem fibres
- Tracheids
- Vessels
General
✓✗Mesophyll belongs to which tissue system?
- Epidermal tissue system
- Vascular tissue system
- None of the tissue systems
- Ground tissue system
General
✓✗The vascular cambium normally gives rise to
- secondary xylem
- periderm
- phelloderm
- primary phloem
General
✓✗Which of the following features is present in a dicot stem but absent in a monocot stem?
- Sclerenchymatous hypodermis
- Bundle sheath of sclerenchyma
- Scattered vascular bundles
- Medullary rays and a distinct pith
General
✓✗The activity of sieve tube elements is controlled by the nucleus of the
- phloem parenchyma
- phloem fibres
- albuminous cells
- companion cells
General
✓✗Which of the following characteristics is not shown by meristematic cells?
- Dense cytoplasm
- Thin cellulose walls
- Large central vacuole
- Prominent nucleus
General
✓✗How many of the following are lateral meristems?
Fascicular vascular cambium, interfascicular cambium, cork cambium, intercalary meristem, root apical meristem, shoot apical meristem
Fascicular vascular cambium, interfascicular cambium, cork cambium, intercalary meristem, root apical meristem, shoot apical meristem
- Three
- One
- Four
- Two
General
✓✗Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Guard cells regulate the opening and closing of stomata.
Reason (R): Guard cells lack chloroplasts.
In the light of the above statements, choose the correct answer from the options given below.
Assertion (A): Guard cells regulate the opening and closing of stomata.
Reason (R): Guard cells lack chloroplasts.
In the light of the above statements, choose the correct answer from the options given below.
- (A) is true but (R) is false.
- (A) is false but (R) is true.
- Both (A) and (R) are true and (R) is the correct explanation of (A).
- Both (A) and (R) are true but (R) is not the correct explanation of (A).
General
✓✗Which tissue gives the gritty texture to the pulp of pear?
- Parenchyma
- Collenchyma
- Sclereids
- Fibres
General
✓✗The chief function of sieve tubes is to
- transport water from roots to leaves
- conduct minerals from the roots
- form wood
- translocate organic food prepared in the leaves
General
✓✗Vessels and companion cells occur together in
- angiosperms
- bryophytes
- pteridophytes
- algae
General
✓✗The hypodermis in a monocot stem is
- chlorenchymatous
- parenchymatous
- sclerenchymatous
- collenchymatous