Agar agar is obtained from

Question

✓

Answer

b
It’s obvious.

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$(i)$ Genus comprises a group of related species which has more characters in common in comparison to species of other genera.

$(ii)$ Three different genera such as Solanum, Datura and Petunia are placed in the family malvaceae.

$(iii)$ In case of plants, classes with a few similar characters are assigned to a higher category called phylum.

Assertion: Plants also have hormones called phytohormones
Reason: They increase the rate of reactions and thus always accelerate growth and other related changes.

$A$. Lenticels are the lens-shaped openings permitting the exchange of gases.

$B$. Bark formed early in the season is called hard bark.

$C$. Bark is a technical term that refers to all tissues exterior to vascular cambium.

$D$. Bark refers to periderm and secondary phloem.

$E$. Phellogen is single-layered in thickness.

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