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- Question 1 of 36
An artificial ecosystem is represented by:
An artificial ecosystem is not self-sustaining, and the ecosystem would perish without human assistance. An aquarium is an artificial ecosystem. In aquarium, all the factors are regulated according to choice. These factors are type of species, food, sunlight and temperature, etc. Without humans, this ecosystem could not sustain itself.
- Question 2 of 36
The constituents of automobile exhaust that can cause cancer is/are:
Polycyclic hydrocarbons (PAHs) are the constituents of automobile exhaust that can cause cancer. PAHs are ubiquitous environmental pollutants generated primarily during the incomplete combustion of organic materials (e.g. coal, oil, petrol, and wood). These PAHs are carcinogenic in nature i.e. leads to cancer.
- Question 3 of 36
The optimum dissolved oxygen level (in mg/litre) required for the survival of aquatic organisms is:
Fish growth and activity usually require 5-6 mg/L of dissolved oxygen. Dissolved oxygen levels below 3 mg/L are stressful to most aquatic organisms.
Healthy water should generally have dissolved oxygen concentrations above 6.5-8 mg/L and between about 80-120 percent.
- Question 4 of 36
An example of false fruit is:
False fruit (Accessory fruit) is a fruit in which some of the flesh is not derived from the ovary but some adjacent tissues exterior to the carpel. Some examples of false fruit are apple, pear, and cucumber that develop from the thalamus, cashew-nut develops from the peduncle, jackfruit and pineapple develop from the entire inflorescence.
- Question 5 of 36
The normal fasting blood sugar level per 100 ml of blood in man is:
Normal fasting blood glucose levels range from 70 to 99 mg/dL (3.9 to 5.5 mmol/L). Higher ranges could indicate pre-diabetes or diabetes.
- Question 6 of 36
A large number of identical plants can be obtained in a short span of time through:
Tissue culture is a technique in which a small fragments of a plant (explant) are introduced into an artificial, nutrient medium, which allows its functioning or growth. Fragments of plant material, perhaps even just a couple of cells, are placed in an artificial growing medium to develop into new plants.
- Question 7 of 36
The smallest flowering plant is:
The world’s smallest flowering plant is the watermeal, or Wolffia globosa.
- Question 8 of 36
Leukaemia or blood cancer is characterised by abnormal increase of the:
Leukaemia is a cancer of the blood or bone marrow and is characterized by an abnormal proliferation of blood cells, usually white blood cells (leukocytes).
- Question 9 of 36
The poison of honey bees is:
The reaction of a person to a bee sting may vary according to the bee species. While bee stinger venom is slightly acidic.
- Question 10 of 36
Birds which swim in water have:
Birds which swim in water have webbed feet. Ducks, geese, and swans all have webbed feet. The primary use for webbed feet is paddling through the water.
- Question 11 of 36
The process of preventing the birds from flying is called:
Brailing is the process of preventing the birds from flying. It is nothing but a piece of tiny ropes of clothes used to cover the bird’s wing. So that the bird lost its balance to flight.
- Question 12 of 36
Veins seen in the leaves, serve the function of:
Veins seen in the leaves, serve the function of transpiration. They are composed of xylem and phloem cells. The vein xylem transports water from the petiole throughout the lamina mesophyll, and the phloem transports sugars out of the leaf to the rest of the plant.
- Question 13 of 36
The edible part of Cabbage is:
Edible part of cabbage is a vegetative bud. Vegetative buds are those from which stem leaves are grown.
- Question 14 of 36
Which of the following processes are associated with plants during the dark period?
Conduction and respiration are associated with plants during the dark period. Conduction is the process by which vital nutrients are transported to the different parts of a plant. This process is independent of the light factor. Respiration always occurs in plants, but night respiration is more evident since the photosynthesis process ceases.
- Question 15 of 36
In an MRI machine, which one of the following is used?
In MRI (Magnetic resonance imaging) machine, a magnetic wave is used. MRI is a method of using a strong magnetic field to produce an image of the inside of a person’s body. Unlike X-ray, CT, and PET scans; MRIs do not use radiation and are considered a non-invasive procedure.
- Question 16 of 36
For generation of biogas, the materials commonly used are:
Biogas is the mixture of gases produced by the breakdown of organic matter in the absence of oxygen (anaerobically), primarily consisting of methane and carbon dioxide. Biogas can be produced from raw materials such as agricultural waste, municipal waste, plant material, sewage, green waste or food waste. Although, cattle dung has been recognised as the chief raw material for biogas plants.
- Question 17 of 36
Goitre is caused by the deficiency of:
A goitre is a swelling of the thyroid gland that causes a lump in the front of the neck. Iodine deficiency is the most common cause of goiter.
- Question 18 of 36
The green colour of the leaves is due to the presence of:
Leaves are green due to the presence of a green-coloured pigment, called chlorophyll. Chlorophyll is important because it helps plants make energy from sunlight—a process called photosynthesis.
- Question 19 of 36
The edible part of onion is:
The edible part in the onion is concentric fleshy, enlarged and scaly leaf bases.
- Question 20 of 36
To which group of blood a universal recipient belongs?
The universal recipient belongs to the AB group of blood. “O blood group” does not have any antigens. It is called the “universal donor” type because it is compatible with any blood type. “AB blood group” is called the “universal recipient” type because a person who has it can receive blood of any type.
- Question 21 of 36
The normal body temperature of human beings is:
The average normal body temperature is generally accepted as 98.6°F (37°C).
- Question 22 of 36
Columba-livia is the scientific name of:
The rock dove, rock pigeon, or common pigeon is a member of the bird family Columba-livia (doves and pigeons).
- Question 23 of 36
Bones are pneumatic in:
Pneumatic bones are hollow and found in birds. Due to pneumatic bones, birds can fly in the air.
- Question 24 of 36
Which of the following produces the highest amount of energy upon oxidation?
Fat produces the highest amount of energy upon oxidation. It is the slowest source of energy but the most energy-efficient form of food. Each gram of fat supplies the body with about 9 calories, more than twice that supplied by proteins or carbohydrates.
- Question 25 of 36
Bleaching powder is used in drinking water as a/an:
Bleaching powder is used in drinking water as a disinfectant. It is an active agent which is used to kill germs and bacteria in drinking water. The main content of the bleaching powder is the Chlorine element which acts as the main disinfectant material.
- Question 26 of 36
An ecosystem consists of:
An ecosystem consists of a community of organisms together with their physical environment. Ecosystems can be of different sizes and can be marine, aquatic, or terrestrial.
- Question 27 of 36
An insect-catching plant is:
Nepenthes is an insect-catching plant. It is a genus of carnivorous plants, also known as tropical pitcher plants, or monkey cups, in the monotypic family Nepenthaceae.
- Question 28 of 36
The method not used as a Biological control is:
Biological control is the use of living organisms to maintain pest populations below damaging levels. Predators of a pest, Pheromone traps and neem extracts are used as a Biological control. Pesticides are not used as a Biological control as it is a chemical agents.
- Question 29 of 36
Wisdom teeth are the:
A third molar is commonly known as a wisdom tooth. It is one of the three molars per quadrant of the human dentition. It is the most posterior of the three. The age at which wisdom teeth come through (erupt) is variable, but this generally occurs between late teens and early twenties.
- Question 30 of 36
Scurvy is caused due to the deficiency of:
Scurvy is caused due to the deficiency of Vitamin C (also known as ascorbic acid). It is caused by not having enough vitamin C in the diet for at least three months. Vitamin C is mainly found in fruit and vegetables.
- Question 31 of 36
Male (Anopheles) mosquito feeds on:
The Male (Anopheles) mosquito feeds on the nectar of flowers. Unlike females, males do not feed on mammalian blood. They use their proboscis or feeding tube to drink nectar from flowers.
- Question 32 of 36
Rickets is the deficiency disease of Vitamin D, in which the affected part is the:
Rickets is a condition that affects bone development in children. It causes bone pain, poor growth and soft, weak bones that can lead to bone deformities. Adults can experience a similar condition, which is known as osteomalacia or soft bones.
- Question 33 of 36
The dried flower buds are used as a spice in:
Cloves are the aromatic dried flower buds of a tree in the family Myrtaceae, Syzygium aromaticum.
- Question 34 of 36
Which part becomes modified as the tusk of elephant?
The tusks of an elephant are upper incisors that are modified to become long and curved. They replace deciduous milk teeth at 6–12 months of age and grow continuously at about 17 cm (7 in) a year.
- Question 35 of 36
The vector of disease sleeping sickness is:
The vector of disease sleeping sickness is tsetse fly. Sleeping sickness (African Trypanosomiasis) is caused by microscopic parasites of the species Trypanosoma brucei. It is transmitted by the tsetse fly (Glossina species).
- Question 36 of 36
For how many years have the dinosaurs been extinct?
Dinosaurs went extinct about 65 million years ago (at the end of the Cretaceous Period), after living on Earth for about 165 million years.