Prepare for NEET Biology Plant Kingdom with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert solutions to understand plant diversity and groups.
Certain Chlorophyceae demonstrate a unique adaptation to nitrogen-deficient environments. What specialized cellular structure enables this adaptation, and what is its primary function?
Heterocysts; nitrogen fixation
Pyrenoids; carbon fixation
Vacuoles; nutrient storage
Flagella; enhanced motility
The unique 'holdfast' structure in certain Phaeophyceae primarily serves what purpose in their challenging intertidal habitats?
Nutrient absorption from the surrounding water
Anchoring to the substrate against strong wave action
Photosynthesis by increasing surface area
Reproduction by producing motile spores
Bryophytes are typically found in which type of environment?
Dry and sunny
Moist and shady
Aquatic
Desert
The presence of winged pollen grains in Pinus is an adaptation for:
Wind pollination
Water pollination
Insect pollination
Self-pollination
Which of the following features is NOT associated with winged pollen grains?
Light weight
Dry surface
Large surface area
Heavy and sticky
How do the wings on pollen grains of some plants contribute to their reproductive success?
Increased dispersal by wind
Attracting pollinating insects
Protection from desiccation
Enhanced nutrient absorption
Conifers thrive in challenging environments due to:
Thick bark, needle-like leaves, and sunken stomata
Broad leaves, shallow roots, and prominent stomata
Thin bark, large leaves, and exposed stomata
Soft stems, feathery leaves, and numerous stomata
Which adaptation helps conifers reduce water loss in arid environments?
Broad leaves
Needle-like leaves
Shallow roots
Thick bark
How does the conical shape of many conifers benefit them in snowy regions?
It increases sunlight absorption.
It helps shed snow, preventing branch breakage.
It attracts pollinators.
It provides camouflage from herbivores.
The sunken stomata in conifers primarily contribute to:
Increased sunlight absorption
Enhanced gas exchange
Reduced water loss
Improved nutrient uptake
