Category: Essays

The origin and ancestory of modern chordates is not very clear and remains obscure. Because their early ancestors most liably were soft bodied and left no definite fossils. The earliest known fossils of truly vertebrate animals were, freshwater forms abundant during the late Silurian and middle devonian periods. Their fossils are collectively known as ostracoderms. They are placed in the group of jawless animals called Agnatha. Image Source: 3.bp.blogspot.com ADVERTISEMENTS: The oldest fragmentary fossils belonging to ostracoderms occur in the late cambrian and middle ordovician. About the place of origin of chordates an American geologist Chamberlain gave the idea of fresh-water origin of chordates in 1900. This idea was supported by Romer and Homer Smith also. Theories of Invertebrate ancestory of chordates: ADVERTISEMENTS: The invertebrate ancestory of chordates is now…

Important body features of scoliodon are given below: 1. Mouth: It is situated a little behind the apex on the ventral side of the anterior region of the body. Mouth is bounded by upper and lower jaws each bearing 1 or 2 rows of sharply, pointed and backwardly directed teeth. Teeth are adapted for holding and tearing of the prey. Image Source: d.fastcompany.net ADVERTISEMENTS: 2. Nares: Two crescentic apertures, the nares or nostrils are present ventro-laterally and anterior to mouth. They are exclusively olfactory, have no role in respiration, as they are not connected to mouth cavity by internal nostrils. ADVERTISEMENTS: 3. External gill slits: Anterior to each pectoral fin, on either side of the body vertically elongated external gill slits or branchial clefts are present in a series of…

320 words short essay on A Rainy Day for kids. This year the summer season was unduly long and extremely hot. It was July and the schools had reopened. The scorching sun and the extreme heat made life miserable. Going to the school, studying in the class or playing on the grounds all seemed to be a punishment.One morning, clouds gathered in the sky. Thunder rolled. Suddenly it started raining. There was a downpour for a short while but soon it turned into a steady rain. It was time for school. So, we took our umbrellas and set off.It was refreshing to go out in the cool air. Everyone and everything looked fresh. The trees were a vivid green. The sound of falling rain was pleasing to the ears. No…

Free sample essay on Scene at a Bus Stop for kids. A bus stop hums with life and activity. At peak hours there is a mad rush. The school and college students as well as the office-goers vie with each other to get into the already crowded buses.All sorts of people can be seen at a bus stop. Some are impatient and look at their watches every few seconds, others are worried and fret. But there are some who wait patiently. They even smile at others. Students stand in groups and talk. It presents a good opportunity to study human nature.At most of the stops people try to stand in queues but as soon as a bus is visible, the queue is broken. Everyone just pushes and jostles. There is…

Short essay on The Man Who Inspired Me for kids. Can I ever forget the octogenarian who stayed with us for two days? He was a tall, frail-looking man who commanded respect. He had immense patience and strove for perfection in everything.He was sent to stay in our house to avoid the hustle and bustle—the crowd and noise due to a wedding in our neighbor’s house. My mother had agreed to have him as she was confident of giving him a calm and peaceful atmosphere in our house. But lo and behold, my sister arrived with her boisterous, naughty kids for a week.My mother got up early in the morning to give milk to the kids before they started screaming. Mr. Joseph was up too, so mother offered him tea.…

Free sample essay on A Brave Deed for kids. Last year, in the month of June, there was a big fire in my neighborhood shops. The gutted shops were mainly of jute and plastic dealers. There were three god owns of plastic toys and two sales depots of jute and gunny bags. One fireman did a marvellous job there. He was later granted two special increments by the Fire Station Officers.The fire was first reported at about 2 a.m. and the fire engines reached the spot around 2.15 a.m. It took them eight hours to extinguish the raging blaze. Luckily, there was no casualty. The staff of these shops was caught unawares. Two of them fainted due to shock. It was here that the fireman made them sit, for two…

For various types of misconduct, there are various types of punishments/penalties. These punishments/penalties can be divided into major penalties and minor penalties are: Penalties 1. Minor Penalties: Is a mild form of disciplinary action? This punishment is generally given for some minor offences. The types of penalties, which are set below are in the ascending order of their severity. i. Oral Reprimand: ADVERTISEMENTS: This is the mildest form of disciplinary action. The issue of reprimand does not involve loss of status or wages.As people (subordinates) invariably value the social approval of their actions by their superiors and fellow beings, a reprimand is generally effective in correcting subordinates. Oral reprimand should be used sparingly; otherwise it will not produce any effect on the subordinate. Image Source: smallbusiness.chron.com ii. Written Reprimand: When…

Short essay on Too Many Cooks Spoil the Broth for kids. There are men and there are men, and every stone is not a gem. No two men can be the same. They differ in one aspect or the other. If both are talented, they may not be equally so.When we take up a project, we need a team of workers. But to avoid mix-ups, we all divide responsibilities, otherwise there is bound to be confusion. At one job there should be one hand.If the boat is rowed by more than one boatman, they should have a perfect and clear understanding. Otherwise each one will do so differently and cause a mishap. Image Source : justinbratton.com ADVERTISEMENTS: In a kitchen, if more than one cook prepares the same dish, there…

Free sample essay on A Cricket Match for kids. Last winter, I happened to see a cricket match in Delhi. The match was played between the Indian team and the West Indies team. The match was played at the Ferozshah Kotla grounds.Every game has its plus points. It fosters discipline, duty, team-spirit, cooperation and a sportsman spirit. Some of the Indian players are very well known.Cricket is quite an interesting game. It is played between two teams of 11 members each. It is played on a flat, smooth and clean ground. Cricket requires two sets of stumps, bat and ball. The distance between the two sets of wickets is 22 yards. The bowlers take their turns after every six balls. In this game, good fielding is also necessary for victory.…

Rousseau and Parks believe that psychological contract is made up of three concepts: Concepts 1. An employee perceives the promise of an obligation by his or her organisation. ADVERTISEMENTS: 2. The psychological contract has to do with acceptance, which says that when the psychological contract is developed, both parties are responsible for holding up their own part of the contract.3. The organisation’s fulfilment of that promise. Image Source: ism.edu.ngWhen a person is hired for a particular job or position, whether there is a formal legally binding contract or not, the individual unknowingly tends to create a perceived contract with the organisation that he will be working for which is the person’s beliefs about what he or she “owes” the company and what the company owes in return.While this contract is…