Question

In Bentham and Hooker's system classification, ranales are included under
A. Calyciflorae
B. Inferae
C. Disc florae
D. Thalami flora

Answer 1

Hint:-For the classification of the living organisms so many scientists proposed there so much theory. Among them, Bentham and hooker also proposed a theory. They generally proposed the theory about the division of dicotyledons plants. They also specify some special plants for a special group in the plant kingdom.

Complete answer:This can be the simplest glorious natural system of classification, forwarded by two English botanists, patron saint Jeremy Bentham and Sir Joseph chemist Hooker. This method of classification was printed within the book 'Genera Plantarum' that became the foremost in style classification in European countries. Bentham and Hooker divided all Phanerogams or seed plants into Dicotyledons, Gymnosperms and Monocotyledons.
They mentioned Dicotyledons initially, then Gymnosperms and at last Monocotyledons.
There are altogether two hundred two families of Angiosperms during this system. They divided Dicotyledons into three subclasses, sub-classes into fourteen series, series into twenty-five cohorts (=order) and cohorts into sixty-five orders (=family).
Dicotyledons started with the family Ranunculaceae and competed with Labiatae (Lamiaceae).
MERITS:
(a) it’s the primary nice natural system of classification.
(b) it's simple to follow for all sensible functions, which is why Key,
Herbarium and several {other and several other} other herbaria of the globe, as well as India, is organized
According to this method.
(c) the outline of families and genera are correct.
(d) order Ranales are given a primitive position during this system. Recent classification
Findings additionally indicate that order Ranales are the foremost primitive among angiosperms.
(e) during this system, the monocots are derived from dicots. Many classifications
Findings additionally support this read.
(f) inserting Monochlamydeae at the top of Dicots.
(g)Placing the sexual flowering plant families once bisexual families, i.e., family Arecaceae and arum family once Liliaceae.
(h) The series Glumaceum with extreme reduced flowers and inflorescMERIT
DEMERITS:
(a)The position of Gymnosperms between Dicots and Monocots during this system is that the foremost demerit. This arrangement is
Done without considering the affinities among these teams.
(b) this method doesn’t provide any plan concerning biological process history of any genus, family or order.
(c) during this system, some closely connected families are separated and placed
Under completely different orders (cohorts). Within the same method numbers of unrelated families are sorted nearer.
(d) Advanced families like orchid family are thought-about primitive
In this system by inserting them within the starting
(e) family Composite may be an extremely advanced family and placed in Inferae at the start of Gamopetalae.
(f) The position of series Apocalypse is unacceptable due to its free and superior
Carpels.

So, option (D) is the correct option.

Note:- The merits of Bentham and hooker classification is that he could specify a place for rannells in thalamiflora.it is the main merits of the Bentham and hooker classification. We have to remember this because it is a very important question. Also the classification of Bentham and hooker was natural.