Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
Which of these combinations correctly matches the seed type with its corresponding post-fertilization structure?
Monocot seed - Fruit with one cotyledon and endosperm; Dicot seed - Fruit with two cotyledons and reduced/no endosperm
Monocot seed - Fruit with two cotyledons and no endosperm; Dicot seed - Fruit with one cotyledon and endosperm
Monocot seed - Fruit with one cotyledon and no endosperm; Dicot seed - Fruit with two cotyledons and endosperm
Monocot seed - Fruit with two cotyledons and endosperm; Dicot seed - Fruit with one cotyledon and no endosperm
In a recalcitrant seed, which physiological factor is PRIMARILY responsible for its inability to withstand desiccation?
Presence of germination inhibitors that prevent metabolic slowdown
Lack of protective proteins that stabilize cellular components during drying
High sensitivity of cellular membranes to dehydration damage
Rapid depletion of stored reserves during the early stages of desiccation
The suspensor in a developing dicot embryo plays a critical role in:
Protecting the embryo from pathogens and environmental stress
Synthesizing growth hormones and regulating embryo development
Forming the root apical meristem and initiating root development
Pushing the embryo into the endosperm and facilitating nutrient absorption
Which of the following is NOT a function of lenticels in woody stems?
Gaseous exchange
Transport of water and minerals
Transpiration
Providing a pathway for pathogens
The arrangement of vascular bundles in a monocot stem is:
Ring-like
Scattered
Radial
Conjoint and collateral
Which tissue in the stem provides mechanical support and flexibility?
Parenchyma
Sclerenchyma
Collenchyma
Xylem
In a dicot stem, the pith is located:
Outside the vascular bundles
Between the xylem and phloem
In the center, surrounded by the vascular bundles
Within the vascular bundles
Which of the following statements regarding the chemical composition of the secondary cell wall is INCORRECT?
It may contain lignin, suberin, or cutin.
It often has multiple layers, denoted as S1, S2, and S3.
It predominantly contains pectin and hemicellulose.
Cellulose microfibrils are arranged in a more parallel fashion compared to the primary wall.
The orientation of cellulose microfibrils in the cell wall plays a crucial role in determining cell shape. If a plant cell has cellulose microfibrils arranged predominantly perpendicular to the direction of cell elongation, what shape is the cell most likely to adopt?
Spherical
Elongated/Rod-like
Cuboidal
Irregular
Plasmodesmata are crucial for intercellular communication. Which component of the cell wall is specifically disrupted during plasmodesmata formation?
Secondary cell wall only
Primary cell wall only
Middle lamella only
Primary cell wall and middle lamella
