Tag: growth and development in plants

The outer thick layer is called as testa and inner thin one as tegmen. The seed develops from the tissue, that is the integument which originally surrounds the ovule. The seed coat forms from the two integuments or outer layers of cells of the ovule, which derive from tissue from the mother plant, the inner integument forms the tegmen and the outer forms the testa. The seed coats of some mononocotyledon plants, such as the grasses, are not distinct structures, but are fused with the fruit wall to form a pericarp.
Therefore, the correct answer is option C.

In hypogeal germination, cotyledons remain underground and plumule is elongated above the ground. 
Hypocotyl is part of the stem situated below the cotyledons. If hypocotyl is the active region, then it will elongate and will bring cotyledons above the ground. But, as stated above cotyledons remain underground. 
Radicle gives rise to primary root during germination process. 
Tigellum is the main axis of embryo which protrudes out of the cotyledons and forms radicle and plumule during germination process. 
Epicotyl is part of the stem above cotyledons. During germination process, epicotyl being the active region elongates and pushes plumule above the ground and cotyledons remain underground.
Thus, the correct answer is option B.

Beer is an alcoholic beverage produced by the saccharification of starch and fermentation of the resulting sugar. The starch and saccharification enzymes are often derived from malted cereal grains, most commonly malted barley. A large part (about 25%) of the remainder is used for malting, for which barley is the best-suited grain. It is a key ingredient in beer and whisky production.
Two-row barley is traditionally used in German and English beers. Six-row barley was traditionally used in US beers, but both varieties are in common usage now. Distilled from green beer, whisky has been made primarily from barley in Ireland and Scotland, while other countries have used more diverse sources of alcohol, such as the more common corn, rye and wheat in the USA. In the US, a grain type may be identified on a whisky label if that type of grain constitutes 51% or more of the ingredients and certain other conditions are satisfied. So, beer is prepared from barley and not from sugarcane, grape and maize. 
Therefore, the correct answer is option B.

The peanut or groundnut (Arachis hypogaea) is a species in the family Fabaceae. Peanuts can be eaten raw, used in recipes, made into oils, textile materials and peanut butter as well as many other uses. In general, peanut products are considered safe for human use, although there are insufficient studies about peanut aflatoxins and uses for cosmetics. Peanut oil is often used in cooking, because it has a mild flavour and a relatively high smoke point. Due to its high monounsaturated content, it is considered healthier than saturated oils and is resistant to rancidity.
There are several types of peanut oil including aromatic roasted peanut oil, refined peanut oil, extra virgin or cold pressed peanut oil and peanut extract.
In the United States, refined peanut oil is exempt from allergen labelling laws. This oil is obtained from seeds of Arachis hypogea. Oryza sativa is rich in carbohydrates. Cicer arietinum is rich in proteins. Hibiscus esculentus (okra) seeds does not contains fats. 
Thus, the correct answer is option A.

Cotton, seed-hair fibre (testa) of a variety of plants of the genus Gossypium, belonging to the Hibiscus or mallow, family (Malvaceae) and native to most subtropical parts of the world.
Cotton is a soft, fluffy staple fiber that grows in a boll, or protective capsule, around the seeds of cotton plants. The fiber is almost pure cellulose. Under natural conditions, the cotton bolls will tend to increase the dispersion of the seeds. So, fibres of Gosssypium are out growth of testa and not out growth of pericarp, pappus hair and bast fibres. 
Therefore, the correct answer is option C.

The seeds of Abrus precatorius are much valued in native jewelry for their bright coloration. Most beans are black and red, suggesting a ladybug, though other colors are available. Jewelry-making with jequirity seeds is dangerous and there have been cases of death by a finger-prick while boring the seeds for beadwork. The seeds were traditionally used to weigh jewellery in India. Seeds of Xanthium, Calotropis and Thespesia are not used as jeweler's weight. 
Therefore, the correct answer is option B.

Cotton is a soft, fluffy staple fiber that grows in a boll or protective capsule, around the seeds of cotton plants of the genus Gossypium in the family of Malvaceae. The fiber is almost pure cellulose. Under natural conditions, the cotton bolls will tend to increase the dispersion of the seeds. Cotton is a seed hair fiber produced from epidermal seed coat. Cotton fibers are not obtained from root hairs, stem hairs or leaf. 
Therefore, the correct answer is option D.

A fertilized, fully grown and ripened ovary forms a fruit. After the process of fertilization, the ovary swells up and develops into a fruit.
Thus, the correct answer is option (C), 'Only ovary'.

Seed is the ripened ovule or mature integumented megasporangium in which outer integument convert into testa and inner integument are grown up as tegmen and after fertilization, the embryo is placed inside seed in dormant state and grow into a new plant in favorable condition.