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 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:
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:
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:
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 :
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:
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 :
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
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:
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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