Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
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
The symbiotic relationship between nitrogen-fixing bacteria and leguminous plants involves complex signaling and structural modifications in the root. Which of the following accurately describes the role of NOD factors in this interaction?
Plant hormones that promote bacterial growth within root nodules
Bacterial signals that trigger root hair curling and cortical cell division
Enzymes produced by the plant to break down bacterial cell walls
Proteins that transport nitrogen from bacteria to plant cells
Which of the following BEST explains the physiological significance of the quiescent center in the root apical meristem?
Promotes rapid cell differentiation to form specialized root tissues
Acts as a reserve of stem cells, protecting the meristem from damage and ensuring continuous growth
Synthesizes hormones that inhibit root elongation and promote branching
Regulates the uptake of water and nutrients from the soil
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
Which of the following statements about chemotaxonomy is incorrect?
It uses chemical constituents of organisms for taxonomic classification.
It can be useful in distinguishing closely related species with similar morphologies.
It can help in understanding evolutionary relationships.
It relies solely on morphological characteristics for classification.
The polyphyletic grouping of organisms is based on:
Shared ancestral characteristics.
Homologous characteristics derived from a common ancestor.
Analogous characteristics due to convergent evolution.
A combination of ancestral and derived characteristics.
In numerical taxonomy, the principle of 'overall similarity' emphasizes:
Prioritizing specific key characters over others.
Focusing on derived characteristics rather than ancestral ones.
Considering a large number of characters and giving equal weight to each.
Using only morphological characteristics for analysis.
Which of the following is not a limitation of classical taxonomy?
It relies heavily on morphological characteristics, which can be subject to convergent evolution.
It may not accurately reflect evolutionary relationships.
It can be difficult to distinguish between homologous and analogous traits.
It incorporates molecular data for a more comprehensive analysis.
A scientist is constructing a phylogenetic tree using cladistics. Which type of character would be considered the most informative for resolving evolutionary relationships within a group?
Plesiomorphy
Symplesiomorphy
Autapomorphy
Synapomorphy
