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.
Which specific characteristic of Chlamydomonas distinguishes its flagellar structure from other Chlorophyceae members?
Presence of flagellar hairs or mastigonemes
Absence of a basal body
9+0 microtubule arrangement in the axoneme
Flagella covered by a sheath of scales
The haptomonada, Pavlova, exhibits a unique flagellar arrangement. How does this differ fundamentally from the typical Chlamydomonas flagellar apparatus?
One flagellum is typically shorter and smooth, lacking hairs
Both flagella are of equal length and covered in hairs
Three flagella emerge from a basal body
Flagella are absent in Pavlova
The 'glycolate metabolism' pathway in some Chlorophyceae involves a unique organelle. Which one is it, and what is its primary function in this context?
Peroxisome; glycolate oxidation
Mitochondrion; ATP synthesis
Chloroplast; CO2 fixation
Golgi apparatus; protein modification
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 protein-rich storage bodies found within the chloroplasts of Chlamydomonas are crucial for survival under stressful conditions. What is the specific name for these structures, and what is their primary composition?
Pyrenoids; RuBisCO and starch
Eyespots; carotenoids and lipids
Vacuoles; water and ions
Flagella; tubulin and dynein
In Volvox, a colonial Chlorophyceae, cytoplasmic connections between cells play a crucial role in coordinating movement and other functions. What is the specific term for these connections, and what is their primary structural composition?
Plasmodesmata; cytoplasmic strands
Desmosomes; intermediate filaments
Gap junctions; connexin proteins
Tight junctions; claudin and occludin proteins
Certain marine brown algae contain algin, which is commercially important. Algin is a type of:
Carrageenan
Agar
Floridean starch
Phycocolloid
Which unusual photosynthetic pigment combination distinguishes members of the class Dinophyceae (dinoflagellates)?
Chlorophyll a, chlorophyll b
Chlorophyll a, phycobilins
Chlorophyll d, phycoerythrin
Chlorophyll a, chlorophyll c, carotenoids
The haplontic life cycle is dominant in which algal group, where the zygote is the only diploid stage?
Fucus
Ectocarpus
Polysiphonia
Volvox
Which algal division is characterized by the presence of a 'peculiar' type of nuclear division and the absence of flagellated stages in its life cycle?
Chlorophyta
Phaeophyta
Rhodophyta
Xanthophyta
