Multiple Choice QuestionsThe mineral present in cell wall is
Na
Ca
K
Mg
B.
Ca
The main components of cell wall are:-
1. Matrix- It consists of water (60%), hemicellulose (5-15%), pectic substances (2-8%), lipids (0.5- 3.0%) and proteins (1-2%).
2. Microfibrils- Cellulose or fungus cellulose (10-15%).
3. Other ingredients- Lignin, cutin, suberin, silica, minerals (Fe, Ca, Carbonate), waxes, tannins etc.
Calcium (Ca2+) ions are used as cations to balance anions in the plant vacuole. It helps in maintaining the chemical balance in the soil that reduces soil salinity and improves water penetration.
Male gamete in angiosperm is produced by
generative cell
microspore cell
vegetative cell
tube cell
Meristematic tissue in vascular bundle is
phellem
procambium
interfascicular cambium
fascicular cambium
What happened when we inoculated Rhizobium in wheat field?
No increase in production (nitrogen content of soil remains same)
A lot of increase in production (nitrogen content of soil increases)
Fertility of soil decreases
Fertility of soil increases
Number of chromosomes in an angiospermic plant is 14, then the number of chromosomes in synergid cells will be
14
7
28
21
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