Science & Mathematics Questions & Answers

Science & Mathematics Questions & Answers

Why do leaves of a touch me not plant fold up when touched?

Why do leaves of a touch me not plant fold up when touched?

A touch me not plant has compound leaves with a slightly swollen structure at the base called pulvinus. The lower half of this is compound of thin walled cells with large inter-cellular spaces and the upper half are thick walled without any inter cellular spaces. When the leaves of the plant are touched, the upper turgid cells put pressure on …

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Why are some plants raised from stalks while others from seeds?

Why are some plants raised from stalks while others from seeds?

Plants can be propagated by two methods viz through seeds and through vegetative plant parts like stalk roots, suckers, clones, cuttings, etc… Plants with fewer and poor quality seeds, not suitable for multiplication, are propagated through vegetative parts. Plants capable of producing a large number of quality seeds are multiplied through seeds. Funny Logics In both the situations, philosophy is …

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Why do plants flower at a certain time of the day?

Why do plants flower at a certain time of the day?

The main function of a flower is to attract pollinators so that they can bring about pollination. Plants flower at a time when their pollinator is most active. For example, flowers of the sausage plant are pollinated by bats. And bats are awake at night so this plant flowers at night. Also flowering in plants is related to the length …

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Why do flowers smell so nice? What is the course of that smell?

Why do flowers smell so nice? What is the course of that smell?

The smell in flowers comes from the special oils that are produced in the petals, as the plant grows. When this oil evaporates, which it does very easily, it gives off a fragrance which we can smell. Various combinations of chemicals in the oil of different flowers result in a variety of smells – some pleasant like those in roses …

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Why can’t coconut and palm trees branch out?

Why can't coconut and palm trees branch out?

Coconut and palm trees grow in height. They have something called sclerenchyma fibres present in their trunks. It is a type of plant tissue which grows vertically and does not allow the coconut and palm trees to branch out. Funny Logic Nature has allowed them to grow tall, but has divested them from them the privilege of branching out. To …

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How does a coconut kernel get filled with water and why doesn’t it evaporate?

How does a coconut kernel get filled with water and why doesn't it evaporate?

The nutritive watery juice of a young coconut kernel is supplied to the fruit by the plant through its conductive tissues (xylem and phloem). The coconut fruit has a three-layered wall_the husky outermost epicarp, followed by the fibrous mesocarp and the innermost endocarp. The endocarp is impervious to air and water an hence, prevents the juice from evaporating. Funny Logic …

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How is the age of a tree determined?

How is the age of a tree determined?

Trees or plants have a varied requirement of water which is determined by the kind of humidity, temperature, sunlight and water sources they are exposed to. Depending on the degree of evaporation of water from the plant, a narrow or a broad ring is formed on the stem. One ring indicates one year of growth in a tree. So the …

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Why does the mouth become dry when there is a feeling of apprehension, concern or fear?

Why does the mouth become dry when there is a feeling of apprehension, concern or fear?

Apprehension, concern or fear stimulates the sympathetic nervous system of the body. Sympathetic stimulation has a direct effect on glandular cells of salivary glands. That causes reduced secretion of salivary glands because sympathetic stimulation causes vasoconstriction of blood vessels supplying the salivary glands. It also causes the formation of concentrated secretion. As a result, the mouth feels dry whenever there …

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