Question

Placentation is axile in the ovary of
A. China Rose
B. Sunflower
C. Pea
D. Ranunculus

Answer 1

Hint: Placentation refers to the arrangement of the ovum inside the ovary. The axile placenta is where the ovary is segmented into separate locules by radial spokes with the placenta. It can be seen on Hibiscus.

Complete answer: Plants also have placentation like animals, and it only occurs in one type of plant known as angiosperms. Placentation is the attachment of ovules within the ovary. The ovules inside the ovary of a flower are attached by funiculi, the part of the plant that is similar to the umbilical cord. The section of the ovary where the funiculus joins is known as the placenta. In angiosperms, there are different types of placentations found: marginal, axile, parietal, basal and free central placentation. In this type of placentation, the ovary is sectioned into two or more chambers. Placenta arises in the central region where the septa intersect in order to form an axile column containing ovules. It is found in ovaries that are bi or multicarpellary and multilocular. China rose, lemon and tomato have axile placentation, i.e., the placenta is located on a central column; partitions from the central column to the ovary wall create chambers that separate the placentae and attached ovaries from each other.
So, the correct answer is option A.

Note: Angiosperms are flowering plants. They have xylem and phloem i.e. they are vascular plants. Stems, roots and leaves are present in them. Angiosperm seeds are discovered in a flower, unlike gymnosperms such as conifers and cycads. Their eggs are fertilised and in the ovary that is normally in a flower, they grow into a seed.