Tag: seeds - structure and germination

When a soaked seed is pressed the water comes out from the pore of the seed which is known as the micropyle.

Roots system develops from the radicle of the embryo because in seed, the radicle grows downward into the soil to absorb water and nutrients from the soil.

Monochlamydeous flower has only one accessory whorl present (perianth). For example, Polygonaceae and Liliaceae.

The only dicot family bearing six cotyledons is Loranthaceae. The Loranthaceae are a family of flowering plants, which has been universally recognized by taxonomists. It consists of about 75 genera and 1,000 species of woody plants, many of them hemiparasites, all of them except three having the mistletoe habit.

Pea is a dicot exalbuminous seed. In the non-endospermic dicotyledons the endosperm is absorbed by the embryo as the latter grows within the developing seed and the cotyledons of the embryo become filled with stored food. At maturity, seeds of these species have no endosperm and are also referred to as exalbuminous seeds. The exalbuminous seeds include the legumes such as beans and peas.
Therefore, the correct answer is option A.

The fruit of a groundnut is a lomentum. In botanical terms, nut specifically refers to indehiscent fruit, the peanut is not technically a nut, but rather a legume and its fruit is a lomentum. Lomentum is a dry fruit of certain leguminous plants, having constrictions between the seeds and separating at maturity into one-seeded segments. A loment (or lomentum) is a type of indehiscent legume fruit that breaks apart at constrictions occurring between segments, so that each segment contains one seed. It is a type of schizocarp.
Thus, the correct answer is option A.

Dicots have floral parts in multiples of four or five, and their seeds contain two cotyledons. The cotyledons usually absorb the food from the endosperm first, and then provide the food for the embryo. 

The active growing region in a dicot embryo which forms shoot is the plumule. The plumule is the young shoot of a plant embryo above the cotyledons, consisting of the epicotyl and often of immature leaves. The young shoot or plumule, is said to be negatively geotropic, because it moves away from the soil it rises by the extension of either the hypocotyl.
Thus, the correct answer is option D.

The peanut or groundnut (Arachis hypogaea) is a species in the family Fabaceae. The peanut was probably first domesticated and cultivated in the valleys of Paraguay. It is an annual herbaceous plant growing 30 to 50 cm tall. Because, in botanical terms, nut specifically refers to indehiscent fruit, the peanut is not technically a nut, but rather a legume. Peanuts are often served in a similar manner to true nuts in many Western cuisines, and are often referred to as a nut in common English.
Thus, the correct answer is option C.