Sexual Reproduction in Flowering Plants - XII (Class...
| Description: Sexual Reproduction in Flowering Plants | |
| Number of Questions: 15 | |
| Created by: Akash Patel | |
| Tags: Sexual Reproduction in Flowering Plants XII Biology Typical Angiospermic Anther Structure of Microsporangium Pre-fertilisation: Structure and Events The Megasporangium (Ovule) Xenogamy Pollination by Water Outbreeding Devices Double Fertilisation Endosperm |
In which of the following types of pollination are genetically different types of pollen grains brought to the stigma?
a. Xenogamy b. Geitonogamy c. Autogamy
Ovules arise from the placenta. In which of the following is one ovule present in an ovary?
a. Paddy b. Papaya c. Watermelon d. Mango
Which of the following statements is/are false?
a. In flowers of different species, the number and length of stamens are the same. b. The proximal end of the filament is attached to the petal of a flower. c. The pollen sacs extend longitudinally all through the length of an anther.
Microsporangium is generally surrounded by four wall layers. Which of the following layers perform(s) the function of protection?
a. The epidermis b. The endothecium c. The middle layer d. The tapetum
Which of the following statements regarding pollen grains is/are false?
a. The hard outer layer of pollen grains is made up of sporopollenin. b. A mature pollen grain contains vegetative cell and generative cell. c. The exine is the inner wall of a pollen grain that is made up of cellulose and pectin.
Which of the following statements is/are false?
a. After triple fusion, the central cell becomes the primary endosperm cell and develops into an embryo. b. Both syngamy and triple fusion take place in an embryo sac. c. Embryo develops at the micropylar end of the embryo sac where the zygote is situated.
Which of the following are examples of water-pollinated plants?
a. Vallisneria b. Hydrilla c. Water hyacinth d. Water lily
Which of the following devices is/are developed by flowering plants to discourage self-pollination and to encourage cross-pollination?
The seeds retaining a part of endosperm due to it not being completely used up during embryo development are albuminous seeds. Which of the following plants have albuminous seeds?
a. Pea b. Barley c. Groundnut d. Maize
Fruits developing only from the ovary are called true fruits. Which of the following are true fruits?
a. Mango b. Banana c. Apple d. Cashew
In a flower, which of the following is the male reproductive part?
The portion of embryonal axis above the level of cotyledons is called the
Which of the following is a tetragonal structure consisting of four microsporangia that are located at the corners?
In which of the following plants is endosperm completely consumed by the developing embryo before seed maturation?
a. Castor b. Coconut c. Groundnut d. Beans
Match the following:
| a. Style | 1. It is the receptive tip of a carpel. |
| b. Stigma | 2. It is the basal bulged part of a pistil. |
| c. Ovary | 3. It is the slender part of a pistil. |