In the leaves of both the rnonocot and dicot plants, very small or miniature openings called stomata were present surrounded by guard cells on the either sides of it. The stomata are equally present on both the epidermal surfaces, i.e. upper and lower surfaces in leaf.

Parathyroid hormone (PTH), also called parathormone or parathyrin, is a hormone secreted by the parathyroid glands that regulates the serum calcium through its effects on bone, kidney, and intestine.The hormones produced in the hypothalamus are corticotrophin-releasing hormone, dopamine, growth hormone-releasing hormone, somatostatin, gonadotrophin-releasing hormone and thyrotrophin-releasing hormone.

Parathyroid hormone is secreted by the four parathyroid glands. They are the tiny glands, about the size of rice granules which are located in the neck of the thyroid gland. Parathyroid hormone controls and regulates the calcium levels in the blood and raise their levels when they are too low. This gland performs its function through its actions on the bones, intestine, and the kidneys.

There are two main types of Parathyroid hormone :

1. Parathormone.
2. Calcitonin.

Some common developmental goals are

1) Equality in the society in which we live.

2) Increase in Income

3) Good Medical Facility

4) Stock of basic necessities

5) Good Education

Common Developmental Goals

Common developmental goals are those development goals which are basic for all humans with irrespective of what field in which they are working.

Non-reactive elements do not easily combine with the other elements. Helium, neon, and argon are examples of very non-reactive elements. A measure of substance equivalents that are dissolved in a volume of solution. Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. As you can see in the periodic table below, noble gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Therefore, noble gases have eight valence electrons. Helium and neon atoms have completely filled outermost electron shells (containing the maximum number of electrons which can be accommodated in them).

Nationalist anxieties developed in the Balkan province due to the subsequent factors:

Balkan was geographically discrete province which involved of presently Croatia, Bosnia- Herzegovina,  Albania, Greece, Romania, Bulgaria, Macedonia, Slovenia, Serbia, and Montenegro.

Developing of Romantic patriotism simultaneously with traditional sentiments of sovereignty.

The destruction of the Ottoman Empire was the major reason which was the sustaining force in the province.

Contrary aspirations of Balkan communities which presumed to accomplish more dominion at the interest of others turned to be the major reason of conflict. It also began to display an exhibition of big potential opposition and rift among several nations.

Reflex action is the extremely quick, automatic, sudden action in response to something in the environment.

Example- i) Immediately pulling back of fingers after touching a hot plate.

ii) Closing of eyes when flashed with high intensity light.

iii) Salivation when hungry.

Different persons have different notions of development because life scenario of persons are different. Some persons are poor and some are rich. They think about those things which are most important to them. Poor person will think about his basic needs such as food, clothing and shelter.

He is a very tactful person. He knows how to deal with people. He adjusts himself well to the circumstances. He immediately understand tricki’s problem. Tricki doesn’t suffer from any sort of illness. The main cause of its illness is overfeeding. He takes the dog to his surgery. There he keeps it in natural environment. The dog gets well under his supervision and natural environment of surgery.

• Pituitary gland: Enclosed deep within the skull, the pituitary gland is the size of a pea. It hangs on a stalk at the base of the brain. It consists of an anterior portion that produces hormones and a posterior portion that has many neural links. This gland is regarded as the master gland as it controls the functions of all the other glands (such as the adrenal, thyroid glands) in the endocrine system. The pituitary gland stimulates the adrenal gland to secrete cortisol, a steroid hormone controls a range of activities from controlling the body’s metabolism to stimulating blood pressure. The pituitary gland also secretes prolactin, which stimulates the production of milk.
• Thyroid gland:The thyroid glands can be found at the front of the neck. It sits low in the throat, between the windpipe. Brownish red, it has blood vessels coursing through it. It secretes hormones that are collectively called thyroid hormones. The most prominent are T3 and T4, which influence the body’s rate of metabolism.
• Parathyroid glands: The parathyroid glands consist of four small glands that are located behind the thyroids in the neck. They influence the calcium levels in the body by producing a hormone called Parathyroid Hormone. Sometimes, when the gland produces excess parathyroid hormones, it can have negative effects such as brittle bones and kidney stones.
• Adrenal glands: The adrenal glands sit atop the kidneys and are no larger than a walnut. These glands produce over 150 hormones that regulate different functions in the body. The most well known is Adrenaline, which triggers the flight or fight response. In other words, this is a stress hormone that helps the organism to either face a dangerous situation or to avoid it altogether.

He was born in South Africa a country where blacks (Africans who are black in colour) were discriminated. But, he was against this discrimination that's why he and others fought for equality and they got justice. In this time period South Africa was banned to play cricket. That is why Mandela says he was born free.