Autecology deals with mcq

Staff Selection Commission is a government recruitment organization that conducts combined higher secondary level examination every year to select candidates for lower division clerks and data entry operators mainly in various government departments. The preliminary part of the examination contains questions from General Awareness in which biology is also included.


In this article, we are bringing to you, questions from previous year papers of the SSC CHSL in order to introduce to you the pattern and the difficulty level of questions that are asked in this exam. SSC CHSL is a very popular examination and you require being well conversant with the pattern and a difficulty level of questions in this examination in order to succeed in this examination.

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Let us see the type of biology questions asked in this exam: -. A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What color change will be noticed? Why do birds not have respiratory trouble at the time of flying at high altitude? Tuberculosis generally affects the lungs, but can also affect other parts of the body.

Most infections do not have symptoms, known as latent tuberculosis. People with latent TB do not spread the disease. The common cold is a self-limited contagious illness that can be caused by a number of different types of viruses.

ECOLOGY MCQs From 1999 to 2017

The common cold is medically referred to as a viral upper respiratory tract infection. Symptoms of the common cold may include cough, sore throat, watery eyes, nasal congestion, runny nose, and sneezing. This is a special kind of diffusion that moves water molecules from a place of higher concentration to a place of lower concentration to create a stable and equal cellular environment. The element which is required by the plant in large quantities:. Carbohydrates have four calories per gram.

Sugars and starches get digested to produce glucose, which is the form of energy preferred by every cell in your body. They also have the advantage of being converted into energy faster than fats and protein. Which of the following pairs has open type of circulatory system? Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood. Protozoan infections are parasitic diseases caused by organisms formerly classified in the Kingdom Protozoa.

They include organisms classified in Amoebozoa, Excavata, and Chromalveolata. Which of the following cytoplasmic organelles are treated as prokaryotic cells within the eukaryotic cells? The central set of reactions involved in ATP production are collectively known as the citric acid cycle or the Krebs cycle. Which one of the following organs excretes water, fat and various catabolic wastes? The kidneys are two bean-shaped organs that extract waste from blood, balance body fluids, form urine, and aid in other important functions of the body.

They reside against the back muscles in the upper abdominal cavity. They sit opposite each other on either side of the spine. Examples of predators and preys are a lion predator and a zebra prey , a chicken predator and an earthworm prey , a mantis predator and a butterfly prey , a spider predator and a housefly prey etc.

It takes place when a species obtains a benefit from another species provoking a gradual damage that does not cause the immediate death of its victim. The species that obtains the benefit causing a gradual damage to the host is called a parasite; while the species that receives the damage is called a host. When the parasite requires an intermediate species between it and its final host, the intermediate species is called a reservoir.

The list of parasites is extraordinarily large.

2 subdivisions of ecology worksheets

It is the stratification of groups into a society given by the influence that one individual or one group of individuals has on the other individuals or groups into the same society. It is the stratification of the individuals that consists in the domination that an individual has on the other individuals of the same population. For example, in a poultry hen, the stronger adult rooster has the absolute control of the other members of that population into that poultry coop.

The dominant rooster is called alpha male. Below the alpha male, all the hens and the weakest roosters occupy a range of hierarchies. The alpha male has preferences to a particular hen, which becomes an alpha female that dominates the other hens and roosters. The second in hierarchy or beta hen, is able to peck to the other individuals of the poultry coop, except to alpha rooster and alpha hen. It is the demarcation and defence of a physical area that is defined by an individual or by a group of individuals. A common case of territoriality is well displayed by dogs.

Dogs delimit a surrounding territory, in connection with the place where they inhabit, using emissions of urine that has an odour detectable by other dogs. The competition can occur effectively if the competition is brought to a harmful struggle between two of the stressed individuals of a population, or unintentionally if the competition does not imply a deadly or harmful ritual, but a natural application of abilities to achieve a required factor. If the contest implies a risk-free ritual of threatening and submissive behaviour, it is called agonistic behaviour.

If the competition does not imply a ritual, it is called a non-ritualistic competition. This kind of exhibitions is frequently reported in birds, like turkeys, swallows, parrots etc and in many animal species like frogs, lions, gorillas etc. Some examples on intra-specific harmful competition are buffaloes fighting for a female, angelfish struggling for the best territory into a fishbowl etc.

Communities are dynamic in nature and change over a period of time.

Tag: entomology multiple choice questions

The process, by which communities of plant and animal species in an area are replaced or changed into another over a period of time is known as ecological succession. Both the biotic and abiotic components are involved in this change. There are two types of successions : primary succession and secondary succession. Primary succession takes place over a bare or unoccupied area such as rocks outcrop, newly formed deltas and sand dunes, emerging volcano islands and lava flows as well as glacial moraines muddy area exposed by a retreating glacier , where no community has existed previously.

The plants that invade first bare land, where soil is initially absent are called pioneer species.

The assemblage of pioneer plants is collectively called pioneer community. A pioneer species generally show high growth rate, but short life span. The pioneer community after sometime gets replaced by another community with different species combination. This second community gets replaced by a third community and so on. Secondary succession is the development of a community, which forms after the existing natural vegetation that constitutes a community is removed, disturbed or destroyed by a natural event like hurricane or forest fire or by human related events like tilling or harvesting land.

A secondary succession is relatively fast as, the soil has the necessary nutrients as well as a large pool of seeds and other dormant stages of organisms. Primary succession is much more difficult to observe than secondary succession because there are relatively very few places on Earth that do not already have.

Each transitional community that is formed and replaced during succession is called a stage in succession or a seral community. The terminal stage of succession forms the community, which is called as climax community. A climax community is stable, mature, more complex and long lasting. The entire sequence of communities in a given area, succeeding each other, during the course of succession is termed sere.

Furthermore, primary succession takes a very long time as compared to secondary succession as the soil is to be formed during primary succession, while secondary succession starts in an area where soil is already present.

Tag: entomology multiple choice questions

Succession that occurs on land, where moisture content is low for e. Latest Updates.

SET Botany Previous Question Papers with Answer key (Kerala) 2…

Classroom Super 50 batch starting on 15th July. Ecology The word ecology is derived from the Greek words Oikos meaning habitation and logos meaning study.

It implies a study of the habitations of organisms. Ecology was first described as a separate field of knowledge in by the German Zoologist Ernst Haeckel, who invented the word Ecology for the relation of the animal to its organic as well as its inorganic environment, particularly its friendly or hostile relations to those animals or plants, with which it comes in contact. Life processes and adaptations Distribution and abundance of organisms. Movement of materials and energy through living communities. Successional development of ecosystems. Abundance and distribution of biodiversity in context of the environment.