Prepare for NEET Biology Morphology of Flowering Plants with MCQs & PYQs on NEET.GUIDE. Get free practice, previous year questions, and expert explanations of plant structures.
In which of the following plants does the stem perform the primary function of photosynthesis?
Ficus
Opuntia
Hibiscus
Mangifera
A plant exhibiting Kranz anatomy experiences a sudden drop in atmospheric CO2 levels. Which of the following is the MOST LIKELY immediate consequence on its photosynthetic efficiency?
Reduced initial fixation of CO2 by PEP carboxylase in mesophyll cells.
Increased oxygenation of RuBisCO in bundle sheath cells.
Immediate cessation of the Calvin cycle in bundle sheath cells.
Enhanced activity of photorespiration in mesophyll cells.
Which specific adaptation in the leaves of submerged hydrophytes contributes MOST significantly to their buoyancy and flexibility in water currents?
Highly dissected leaves
Absence of stomata
Presence of extensive aerenchyma
Thin cuticle
In a CAM plant undergoing a prolonged drought, which physiological change would be MOST prominent in its leaves during the daytime?
Stomata open, and CO2 is directly fixed by RuBisCO.
Stomata remain closed, and malate is decarboxylated to release CO2.
Stomata partially open, and PEP carboxylase fixes atmospheric CO2.
Stomata remain closed, and the Calvin cycle ceases completely.
Which of the following combinations of inflorescence types and their branching patterns is INCORRECT?
Raceme - monopodial
Umbel - monopodial
Spadix - dichasial cyme
Cyme - sympodial
A researcher observes an inflorescence where the main axis terminates in a flower, and further growth occurs through lateral branches, each of which also terminates in a flower. This pattern repeats multiple times. However, the flowers at each branching point are not at the same level. This inflorescence is BEST described as a:
Racemose
Umbel
Monochasium
Capitulum/Head
In a particular angiosperm species, the development of the endosperm is initiated only after fertilization of the central cell. However, a mutation leads to autonomous endosperm development even without fertilization. Which of the following is the MOST likely consequence of this mutation?
Enhanced seed viability and germination rate
Formation of seeds with underdeveloped embryos or no embryos at all
Increased fruit size and seed number
Premature fruit ripening and abscission
A researcher observes a flower with a superior ovary, numerous stamens, and petals fused into a corolla tube. Based solely on these characteristics, to which of the following families does this flower MOST likely belong?
Liliaceae
Brassicaceae
Solanaceae
Fabaceae
A flower exhibits a pentamerous, actinomorphic perianth, a syncarpous gynoecium with a superior ovary, and ten stamens in two whorls. Which of the following floral formulas BEST represents this flower?
✶K5C5A5+5G(5)
✶K(5)C(5)A10G5
↑K5C5A10G(5)
✶K5C5A(5+5)G5
Which specific tissue within the root endodermis is primarily responsible for regulating the passage of water and minerals into the stele, and how does its structure facilitate this function?
Pericycle; its meristematic nature allows for selective uptake
Cortex; its large intercellular spaces facilitate diffusion
Casparian strip; suberin deposition in cell walls blocks apoplastic pathway
Phloem; its active transport mechanisms selectively move nutrients
