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Identify the correct combination
A. Neem- Absence of buds in the axils of leaflets- Pinnately compound leaf
B. Sunflower- Opposite phyllotaxy- Inferior ovary
C. Carrot- Flowers brought to same height due to varied lengths of pedicels - Involucres of bracts.
D. Pista- Discoid stem- Lateral branches with many internodes

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Last updated date: 13th Jun 2024
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Answer
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Hint: A genus of aquatic plant in the arum family, Araceae which is often called as water cabbage or water lettuce, Nile cabbage or shellflower. It is difficult to grow at home.

Complete answer:
If we look at the given options,
> Option A is Neem- Absence of buds in the axils of leaflets- Pinnately compound leaves. Neem has pinnately compound leaves but the buds are not absent but there is presence of buds in the axils of leaflets therefore it is not a correct combination and hence this option gets eliminated.

> Option B is sunflower. It does not have the opposite phyllotaxy but it has alternate phyllotaxy. Ovary is inferior which is when the ovary is situated below the petals and sepals and that ovary is called an inferior ovary. Since the phyllotaxy is alternate then this option is not the correct and therefore it gets eliminated.

> Option C is Carrot- Flowers brought to same height due to varied lengths of pedicels - Involucres of bracts. When all the flowers arise from the single point of peduncle then it is called umbel inflorescence. This inflorescence is seen in carrot not the Flowers brought to the same height due to varied lengths of pedicles. It has involucres of bracts at the base of whole inflorescence. So, this option is also not the correct one as the combination is not correct.

> Option D is Pista- Discoid stem- Lateral branches with many internodes. It is an aquatic plant which has a discoid stem and the lateral branches are also with many internodes. Each node has a rosette of leaves and tuft of roots. So, this is the correct option as this combination is the correct one.

Hence, the correct answer is option (D).

Note: Neem has pinnately compound leaves but there is presence of buds, Sunflower has alternate phyllotaxy and inferior ovary, Carrot has involucres of bracts but flowers are not brought to same height, Pista is an aquatic plant which has discoid stem and lateral branches with many internodes.