Unit 1: Diversity in Living World — Online MCQ Test
BIOLOGY · NEET (All) · NEET
Practice Unit 1: Diversity in Living World with a free chapter-wise online MCQ test.
This chapter covers: What is living? ; Biodiversity; Need for classification;; Taxonomy & Systematics; Concept of species and taxonomical hierarchy; Binomial nomenclature; Five kingdom classification;....
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Unit 1: Diversity in Living World — Important Questions & Answers
Which of the following pairs is of unicellular algae?
- A. Gelidium and Gracilaria
- B. Anabaena and Volvox
- C. Chlorella and Spirulina
- D. Laminaria and Sargassum
Answer: C. Chlorella and Spirulina
Chlorella and Spirulina are unicellular algae often used as single-cell protein sources. Anabaena is a cyanobacterium (though often included in biology units), while others are multicellular.
Chlorella and Spirulina are unicellular algae often used as single-cell protein sources. Anabaena is a cyanobacterium (though often included in biology units), while others are multicellular.
Strobili or cones are found in:
- A. Pteris
- B. Marchantia
- C. Equisetum
- D. Salvinia
Answer: C. Equisetum
In Pteridophytes, distinct strobili or cones are observed in genera like Equisetum and Selaginella.
In Pteridophytes, distinct strobili or cones are observed in genera like Equisetum and Selaginella.
Match the following columns and select the correct option.
- A. Column I: (a) 6-15 pairs of gill slits, (b) Heterocercal caudal fin, (c) Air Bladder, (d) Poison sting; Column II: (i) Trygon, (ii) Cyclostomes, (iii) Chondrichthyes, (iv) Osteichthyes. Match: (1) (iii)(iv)(i)(ii) (2) (iv)(ii)(iii)(i) (3) (i)(iv)(iii)(ii) (4) (ii)(iii)(iv)(i)
- B. Option 1
- C. Option 2
- D. Option 4
Answer: D. Option 4
Cyclostomes have 6-15 pairs of gill slits (a-ii). Chondrichthyes have heterocercal caudal fin (b-iii). Osteichthyes have air bladder (c-iv). Trygon belongs to Chondrichthyes and has a poison sting (d-i).
Cyclostomes have 6-15 pairs of gill slits (a-ii). Chondrichthyes have heterocercal caudal fin (b-iii). Osteichthyes have air bladder (c-iv). Trygon belongs to Chondrichthyes and has a poison sting (d-i).
Bilaterally symmetrical and acoelomate animals are exemplified by:
- A. Platyhelminthes
- B. Aschelminthes
- C. Annelida
- D. Ctenophora
Answer: A. Platyhelminthes
Platyhelminthes (flatworms) are the primary phylum characterized by bilateral symmetry and an acoelomate body plan.
Platyhelminthes (flatworms) are the primary phylum characterized by bilateral symmetry and an acoelomate body plan.
Floridean starch has structure similar to:
- A. Amylopectin and glycogen
- B. Mannitol and algin
- C. Laminarin and cellulose
- D. Starch and cellulose
Answer: A. Amylopectin and glycogen
Floridean starch is the reserve food material of Rhodophyceae, and its structure is very similar to amylopectin and glycogen.
Floridean starch is the reserve food material of Rhodophyceae, and its structure is very similar to amylopectin and glycogen.
Which of the following is correct about viroids?
- A. They have free RNA without protein coat.
- B. They have DNA with protein coat.
- C. They have free DNA without protein coat.
- D. They have RNA with protein coat.
Answer: A. They have free RNA without protein coat.
Viroids consist only of a low molecular weight RNA molecule without a protein coat.
Viroids consist only of a low molecular weight RNA molecule without a protein coat.
Match the following columns and select the correct option. Column I: (a) Gregarious, polyphagous pest, (b) Adult with radial symmetry and larva with bilateral symmetry, (c) Book lungs, (d) Bioluminescence Column II: (i) Asterias, (ii) Scorpion, (iii) Ctenoplana, (iv) Locusta
- A. (iv) (i) (ii) (iii)
- B. (iii) (ii) (i) (iv)
- C. (ii) (i) (iii) (iv)
- D. (i) (iii) (ii) (iv)
Answer: A. (iv) (i) (ii) (iii)
Locusta is a gregarious pest (iv), Asterias exhibits radial symmetry in adults and bilateral in larvae (i), Scorpions use book lungs for respiration (ii), and Ctenoplana is known for bioluminescence (iii).
Locusta is a gregarious pest (iv), Asterias exhibits radial symmetry in adults and bilateral in larvae (i), Scorpions use book lungs for respiration (ii), and Ctenoplana is known for bioluminescence (iii).
Which one of the following is the characteristic feature of gymnosperms?
- A. Seeds are enclosed in fruits.
- B. Seeds are naked.
- C. Seeds are absent.
- D. Gymnosperms have flowers for reproduction.
Answer: B. Seeds are naked.
Gymnosperms (naked-seeded plants) are characterized by having seeds that are not enclosed within an ovary or fruit.
Gymnosperms (naked-seeded plants) are characterized by having seeds that are not enclosed within an ovary or fruit.
Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom
- A. Protista
- B. Fungi
- C. Animalia
- D. Monera
Answer: A. Protista
All unicellular eukaryotic organisms like diatoms, desmids (chrysophytes), euglenoids, dinoflagellates, and slime moulds are included in Kingdom Protista.
All unicellular eukaryotic organisms like diatoms, desmids (chrysophytes), euglenoids, dinoflagellates, and slime moulds are included in Kingdom Protista.
After karyogamy followed by meiosis, spores are produced exogenously in
- A. Neurospora
- B. Saccharomyces
- C. Agaricus
- D. Alternaria
Answer: C. Agaricus
In Basidiomycetes (e.g., Agaricus), after karyogamy and meiosis, basidiospores are produced exogenously on the surface of club-shaped structures called basidia. In contrast, Neurospora (Ascomycete) produces ascospores endogenously within asci; Saccharomyces produces ascospores endogenously; Alternaria (Deuteromycete) reproduces by conidia but does not follow this sexual pathway.
In Basidiomycetes (e.g., Agaricus), after karyogamy and meiosis, basidiospores are produced exogenously on the surface of club-shaped structures called basidia. In contrast, Neurospora (Ascomycete) produces ascospores endogenously within asci; Saccharomyces produces ascospores endogenously; Alternaria (Deuteromycete) reproduces by conidia but does not follow this sexual pathway.