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300 questions in this collection · Page 10 of 30
Question 91 of 300
📘 CLASS XI
Morphology Of Flowering Plants
A seed is composed of which two primary structures?
A seed is made up of a seed coat and an embryo.
Question 92 of 300
📘 CLASS XI
Morphology Of Flowering Plants
In a dicotyledonous seed, the seed coat has two layers. The outer layer is the ______ and the inner layer is the ______.
The seed coat of a dicotyledonous seed has two layers, the outer testa and the inner tegmen.
Question 93 of 300
📘 CLASS XI
Morphology Of Flowering Plants
What is the hilum on a dicotyledonous seed coat?
The hilum is a scar on the seed coat through which the developing seeds were attached to the fruit.
Question 94 of 300
📘 CLASS XI
Morphology Of Flowering Plants
In some seeds like castor, a food-storing tissue is formed as a result of double fertilisation. These seeds are called:
In some seeds such as castor the endosperm formed as a result of double fertilisation, is a food storing tissue and called endospermic seeds.
Question 95 of 300
📘 CLASS XI
Morphology Of Flowering Plants
In plants like bean, gram, and pea, endosperm is not present in mature seeds, and they are called:
In plants such as bean, gram and pea, the endosperm is not present in mature seeds and such seeds are called non-endospermous.
Question 96 of 300
📘 CLASS XI
Morphology Of Flowering Plants
While most monocotyledonous seeds are endospermic, which of the following monocot seeds is non-endospermic?
Generally, monocotyledonous seeds are endospermic but some as in orchids are non-endospermic.
Question 97 of 300
📘 CLASS XI
Morphology Of Flowering Plants
In cereals like maize, the outer covering of the endosperm separates the embryo by a proteinous layer called the:
The outer covering of endosperm separates the embryo by a proteinous layer called aleurone layer.
Question 98 of 300
📘 CLASS XI
Morphology Of Flowering Plants
In a monocotyledonous seed, the large and shield-shaped cotyledon is known as the ______; while the plumule and radicle are enclosed in sheaths called ______ and ______ respectively.
The monocot embryo consists of one large and shield shaped cotyledon known as scutellum, and a short axis with a plumule and a radicle enclosed in sheaths called coleoptile and coleorhiza respectively.
Question 99 of 300
📘 CLASS XI
Morphology Of Flowering Plants
In a floral formula, what do the symbols 'K' and 'C' represent, and how is adhesion between whorls indicated?
In the floral formula, K stands for calyx and C for corolla. Fusion is indicated by enclosing the figure within brackets, and adhesion by a line drawn above the symbols of the floral parts.
Question 100 of 300
📘 CLASS XI
Morphology Of Flowering Plants
Which of the following represents the correct combination of vegetative and floral characters of the Solanaceae family?
Solanaceae exhibits: underground stem in potato; alternate, exstipulate leaves with reticulate venation; bisexual, actinomorphic flowers; persistent calyx; epipetalous stamens; superior, bilocular ovary with axile placentation and swollen placenta.