Vegetative reproduction through runners is observed in:

The correct answer is C: Strawberry. Strawberry reproduces vegetatively through runners (stolons) that develop new plants at nodes.

The phenomenon of radial vascular bundles is characteristic of:

The correct answer is A: Dicot roots with alternating xylem and phloem. Radial arrangement of xylem and phloem in alternate pattern is typical of dicot roots, where xylem arms point toward the periphery and phloem patches lie between them.

During the Calvin cycle, the reduction phase requires ATP and NADPH. How many molecules of ATP are consumed to fix one molecule of CO2?

The correct answer is C: 3 ATP molecules. The Calvin cycle requires 3 ATP and 2 NADPH for each CO2 fixed. One ATP is used in the carboxylation step, and 2 ATP are used in the reduction phase to regenerate RuBP.

In apomixis, the formation of seeds without meiosis and fertilization occurs through which mechanisms?

The correct answer is B: Apospory, apomeiosis, or parthenogenesis. Apomixis includes apospory (diploid egg from vegetative cells), apomeiosis (unreduced spore formation), and parthenogenesis (unfertilized egg development), all bypassing meiosis and fertilization.

The phenomenon where secondary xylem appears as annual rings in cross-sections of dicot stems is due to

The correct answer is A: Variation in cell size and wall thickness between seasons. Annual rings form due to seasonal variations in xylem formation: large earlywood cells (spring) and smaller latewood cells (summer), creating visible rings.

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NEET Botany
Ecology & Environment

Botany questions for NEET UG — Plant Anatomy, Physiology, Reproduction, Ecology.

2 Q 7 Topics Take Mock Test

Difficulty: All Easy Medium Hard 1–2 of 2

Topics in NEET Botany

All Plant Kingdom 100 Plant Anatomy 100 Plant Physiology 100 Reproduction in Plants 60 Genetics & Heredity 20 Ecology & Environment 20 Biotechnology in Plants 20

Q.1 Hard Ecology & Environment

Which of the following phenomena is an example of positive feedback in an ecosystem?

A Predator controlling prey population

B Climate warming causing increased CO₂ release from thawing permafrost

C Decomposition breaking down dead organic matter

D Plants reducing atmospheric CO₂ through photosynthesis

Correct Answer: B. Climate warming causing increased CO₂ release from thawing permafrost

EXPLANATION

Climate warming → permafrost thaw → CO₂ release → more warming is a positive feedback loop that amplifies the initial change, unlike negative feedback which stabilizes systems.

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Q.2 Hard Ecology & Environment

The biodiversity of India is attributed primarily to:

A Large geographical area only

B Diverse climates, topography, rainfall patterns, and geological history

C High human population

D Recent conservation efforts

Correct Answer: B. Diverse climates, topography, rainfall patterns, and geological history

EXPLANATION

India's exceptional biodiversity is due to its diverse climatic zones (tropical to alpine), varied topography, monsoon patterns, and complex geological history creating multiple ecological niches.

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NEET Botany Ecology & Environment

NEET Botany
Ecology & Environment