Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
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
A researcher observes that a particular plant species exhibits significantly reduced root hair development when grown in a hydroponic solution lacking phosphorus. Which physiological role of phosphorus in root hair formation is MOST likely affected?
Major component of cell wall cellulose
Cofactor for enzymes involved in lignin biosynthesis
Nucleic acid synthesis and energy transfer for cell division and elongation
Regulation of stomatal closure to prevent water loss
A plant species adapted to waterlogged conditions exhibits aerenchyma formation in its roots. Which of the following BEST explains the adaptive advantage of this anatomical modification?
Increases root surface area for enhanced water absorption
Provides structural support to prevent root collapse in saturated soil
Facilitates oxygen transport to submerged root tissues, enabling aerobic respiration
Stores excess water for use during periods of drought
A taxonomist discovers a new species of insect. Phylogenetic analysis places it within the order Coleoptera, but its morphology is so unique it warrants a new family. Which of the following taxonomic ranks will not necessarily be assigned a new name for this insect?
Order
Family
Genus
Species
