Guard cells help in:

Guard cells help in:

Options

(a) transpiration (b) guttation (c) fighting against infection (d) protection against grazing

Correct Answer:

transpiration

Explanation:

Guard cells help in transpiration. Transpiration is the evaporation of water from […]

T.O. Diener discovered

T.O. Diener discovered a:

Options

(a) free infectious DNA (b) infectious protein (c) bacteriophage (d) free infectious RNA

Correct Answer:

free infectious RNA

Explanation:

Theodor O. Diener discovered the Potato Spindle Tuber Viroid […]

Synapsis occurs between

Synapsis occurs between:

Options

(a) mRNA and ribosomes (b) spindle fibres and centromere (c) two homologous chromosomes (d) a male and a female gamete

Correct Answer:

two homologous chromosomes

Explanation:

Synapsis (also called syndesis) […]

Meiosis takes place in:

Meiosis takes place in:

Options

(a) Conidia (b) Gemmule (c) Megaspore (d) Meiocyte

Correct Answer:

Meiocyte

Explanation:

Meiosis takes place in meiocyte while Coonidia and Gemmule are asexual structures and megaspore is haploid.

Point mutation involves:

Point mutation involves:

Options

(a) change in single base pair (b) duplication (c) deletion (d) insertion

Correct Answer:

change in single base pair

Explanation:

A point mutation is a simple change in one […]

Phyllode is present in :

Phyllode is present in :

Options

(a) Asparagus (b) Euphorbia (c) Australian Acacia (d) Opuntia

Correct Answer:

Australian Acacia

Explanation:

Phyllode is present in Australian Acacia. It is modification of leaf in which […]

manganese is required in:

manganese is required in:

Options

(a) Plant cell wall formation (b) photolysis of water during photosynthesis (c) chlorophyll synthesis (d) nucleic acid synthesis

Correct Answer:

photolysis of water during photosynthesis

Explanation:

Manganese is […]

Lenticels are involved in :

Lenticels are involved in :

Options

(a) Gaseous exchange (b) Food transport (c) Photosynthesis (d) Transpiration

Correct Answer:

Gaseous exchange

Explanation:

Lenticels are lens shaped openings occurs in stems of most of the […]

Inflorescence is racemose in

Inflorescence is racemose in

Options

(a) Soyabean (b) Brinjal (c) Tulip (d) Aloe

Correct Answer:

Soyabean

Explanation:

Inflorescence in family fabaceae(e.g.,soyabean) is racemose. Inflorescence in family liliaceae(e.g.,tulip, Aloe) is solitary/cymose; often umbellate. Inflorescence […]

Guttation is the result of:

Guttation is the result of:

Options

(a) diffusion (b) transpiration (c) osmosis (d) root pressure

Correct Answer:

root pressure

Explanation:

The main cause of guttation in plants is root pressure. During night when […]

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