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Question 1 of 37
An artificial ecosystem is represented by:
An artificial ecosystem is not self-sustaining, and the ecosystem would perish without human assistance. For example, a farm is an artificial ecosystem that consists of plants and species outside their natural habitat. Without humans, this ecosystem could not sustain itself. In aquarium, all the factors are regulated according to choice. These factors are type of species, food, sunlight and temperature, etc.
Question 2 of 37
The constituents of automobile exhaust that can cause cancer is are:
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental pollutants generated primarily during the incomplete combustion of organic materials (e.g. coal, oil, petrol, and wood). Long-term exposure to low levels of some A PAH has caused cancer. Benzo(a)pyrene is the most common PAH to cause cancer in animals.
Question 3 of 37
The optimum dissolved oxygen, level (in mg/litre) required for 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 %.
Question 4 of 37
An example of false fruit is:
False fruit a fruit formed from other parts of the plant as well as the ovary, especially the receptacle, such as the strawberry or fig. 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. Some other examples are banana, strawberry, etc.
Question 5 of 37
Normal fasting blood sugar level per 100 ml. of blood in man is:
Normal blood glucose level (while fasting) range within 70 to 99 mg/dL (3.9 to 5.5 mmol/L). Higher ranges could indicate pre-diabetes or diabetes.
Question 6 of 37
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 37
The smallest flowering plant is:
The world’s smallest flowering plant is the watermeal, or Wolffia globosa.
Question 8 of 37
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 37
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 37
Birds which swim in water have:
Ducks, geese, and swans all have webbed feet. The primary use for webbed feet is paddling through water.
Question 11 of 37
The process of preventing the birds from flying is called:
‘Brailing’ 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 37
Veins seen in the leaves, serve the function of:
Veins are composed of xylem and phloem cells embedded in parenchyma, sometimes sclerenchyma, and surrounded by bundle sheath 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 37
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 37
Which of the following processes are associated with plants during dark period?
This process of transporting water and salts upwards through xylem and food in upwards and downward directions through phloem is called conduction. Plant respiration occurs 24 hours per day, but night respiration is more evident since the photosynthesis process ceases. In respiration plants release carbon dioxide and take in oxygen and oxidation of stored food by absorbed oxygen takes place.
Question 15 of 37
In MRI machine, which one of the following is used?
Unlike X-ray, CT, and PET scans, MRIs do not use radiation and is considered a non-invasive procedure. Instead, MRIs use a strong magnetic field and radio waves to take pictures of your brain.
Question 16 of 37
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, manure, municipal waste, plant material, sewage, green waste or food waste. Although, cattle dung has been recognized as the chief raw material for biogas plants.
Question 17 of 37
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 37
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 37
The edible part of onion is:
The edible part in the onion is concentric fleshy, enlarged and scaly leaf bases.
Question 20 of 37
To which group of blood a universal recipient belongs?
“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 37
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 37
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 37
Bones are pneumatic in:
Pneumatic bones found in birds. Pneumatic bones are hollow. and since of pneumatic bones, birds can fly within the air.
Question 24 of 37
Which of the following produces the highest amount of energy upon oxidation?
Fats are 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. Because fats are such an efficient form of energy, the body stores any excess energy as fat.
Question 25 of 37
Bleaching powder is used in drinking water as a/an:
Bleaching powder 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 37
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 37
An insect-catching plant is:
Nepenthes is a genus of carnivorous plants, also known as tropical pitcher plants, or monkey cups, in the monotypic family Nepenthaceae.
Question 28 of 37
The method not used as a Biological control is:
An example of biological control is the release of parasitic wasps to control aphids. Aphids are a pest of plants and cause huge damage to plants as they remove nutrients from the plant.
Question 29 of 37
Wisdom teeth are the:
A third molar, commonly called wisdom tooth, 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 37
The tusk of elephant is enormously enlarged:
The tusks of an elephant are upper incisors that are modified to become long and curved.
Question 31 of 37
Scurvy is caused due to the deficiency of:
Scurvy is caused by not having enough vitamin C in your diet for at least 3 months. Vitamin C is mainly found in fruit and vegetables.
Question 32 of 37
Male (Anopheles) mosquito feeds on:
Unlike females, males do not feed on mammalian blood. They use their proboscis or feeding tube to drink nectar from flowers.
Question 33 of 37
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 34 of 37
The dried flower buds are used as a spice in:
Cloves are the aromatic flower buds of a tree in the family Myrtaceae, Syzygium aromaticum.
Question 35 of 37
Which part becomes modified as the tusk of elephant?
The tusks of an elephant are modified second incisors in the upper jaw. They replace deciduous milk teeth at 6–12 months of age and grow continuously at about 17 cm (7 in) a year.
Question 36 of 37
The vector of disease sleeping sickness is:
African Trypanosomiasis, also known as “sleeping sickness”, is caused by microscopic parasites of the species Trypanosoma brucei. It is transmitted by the tsetse fly (Glossina species), which is found only in sub-Saharan Africa.
Question 37 of 37
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.