Question

According to Oswald Tippo, angiosperms are placed under
(a)Atracheata
(b)Thallophyta
(c)Tracheophyta
(d)Spermatophyta

Answer 1

They are placed under the seed-producing plants. In the classification system given by Eichler, this division is also known by the name Phanerogamae. In this division of plants, the sex organs are distinct and visible.

Complete step-by-step answer:
Oswald Tippo, in 1942 classified the plant kingdom into two kingdoms based on the presence or absence of the embryo namely: Thallophyta and Embryophyta, which was again divided until it divided into Spermatophyta. The Spermatophyta consists of two groups Angiosperms and Gymnosperms. Therefore angiosperms belong under Spermatophyta.

Additional Information:
-Oswald Tippo divided the kingdom Embryophyta into two groups based on the presence or absence of the vascular tissues namely Bryophyta and Tracheophyta.
-The Tracheophyta were again divided on the basis of presence or absence of seed namely Pteridophyta and Spermatophyta.
-The Spermatophyta is the group of land plants or embryophytes.
-The Spermatophyta is again divided to form five divisions, out of which four come under the gymnosperms while the last one comes under angiosperms.
-The gymnosperms divisions are Cycadophyta (cycads), Ginkgophyta (Ginkgo), Pinophyta (conifers), and Gnetophyta (Gnetum, Ephedra, and Welwitschia).
-The angiosperms consist of Magnoliophyta which are the flowering plants and possess seeds covered in fruit.
-The evolution of seed plants occurs around 319 million years ago.
-These plants bear two types of cones, one is the male cone while the other is the female cone.
-They consist of conducting tissues xylem and phloem, xylem helps in the conduction of water while phloem helps in the conduction of food.
So, the correct answer is, “ Angiosperms are placed under Spermatophyta.”

Note: The word phanerogams is derived from the Greek word phaneros, meaning ‘visible’. The opposite of phanerogams is the cryptogams. The word cryptogamae is derived from the Greek word kryptos , meaning 'hidden’ and gamy , meaning ‘to marry'. Thallophyta is the lower plant with the thallus-like body and is non-motile. Tracheophyta is the vascular plants that help in the conduction of water and minerals.