12th Grade: Take This Biology Test To Check Your IQ Level

Explanation
Living things are classified into five kingdoms: Animalia, Plantae, Fungi, Protista, and Monera. Each kingdom represents a distinct group of organisms based on their characteristics and evolutionary relationships. The five-kingdom classification system was proposed by Robert Whittaker in 1969 and is widely accepted in biological sciences.

Explanation
The relationship between a lion and an antelope is predation. Predation is a type of relationship in which one organism, the predator (lion), hunts, kills, and consumes another organism, the prey (antelope), for food. Lions are carnivores and rely on hunting and consuming other animals, such as antelopes, as their primary source of nutrition. This relationship is characterized by the lion actively hunting and preying on the antelope, resulting in the antelope's death and providing sustenance for the lion.

Explanation
Bread is considered an energy-giving food because it is a rich source of carbohydrates. Carbohydrates are the body's primary source of energy, providing fuel for daily activities and bodily functions. Bread contains complex carbohydrates, which are broken down into glucose and stored as glycogen in the muscles and liver. This glycogen is then used as a readily available energy source when needed. Additionally, bread often contains other nutrients like vitamins and minerals that contribute to overall energy production in the body.

Explanation
The function of the contractile vacuole in Euglena is osmo-regulation. Osmo-regulation refers to the control of water balance and solute concentration within the cell. The contractile vacuole helps to maintain the proper balance of water and solutes by collecting excess water and expelling it from the cell. This process prevents the cell from swelling or bursting due to the influx of water. Therefore, osmo-regulation is crucial for the survival of Euglena in different environments with varying levels of water and solutes.

Explanation
Robert Hooke is credited with discovering the cell. In 1665, he observed thin slices of cork under a microscope and noticed small compartments that resembled the cells of a monastery, which led him to coin the term "cell." His discovery laid the foundation for the field of cell biology and our understanding of the basic unit of life.

Explanation
Proteins are responsible for the production of hormones in the body. Hormones are chemical messengers that regulate various bodily functions, including growth, metabolism, and reproduction. Proteins are made up of amino acids, which are essential for the synthesis of hormones. They act as signaling molecules and help in transmitting messages between cells and organs. Therefore, protein is the correct answer as it plays a crucial role in the production of hormones.

Explanation
Scurvy is a deficiency of Vitamin C. It is a condition caused by a lack of Vitamin C in the diet, leading to symptoms such as weakness, fatigue, swollen and bleeding gums, and joint pain. Vitamin C is essential for the production of collagen, a protein that helps in the formation of connective tissues, and its deficiency can result in the breakdown of these tissues. Scurvy can be prevented and treated by consuming foods rich in Vitamin C, such as citrus fruits, strawberries, and leafy greens.

Explanation
Goitre is caused by a lack of iodine. Iodine is a crucial nutrient required for the production of thyroid hormones. When the body doesn't get enough iodine, the thyroid gland enlarges in an attempt to compensate for the deficiency. This enlargement of the thyroid gland leads to the formation of a goitre. Lack of calcium, zinc, or iron does not directly cause goitre.

Explanation
Spinach is an autotroph because it is capable of producing its own food through the process of photosynthesis. Autotrophs are organisms that can synthesize organic compounds from inorganic substances, such as sunlight and carbon dioxide. In contrast, rabbits, termites, and maggots are heterotrophs, which means they rely on consuming other organisms for their energy and nutrients.

Explanation
The anther is the male reproductive organ of a flower. It is responsible for producing and releasing pollen, which contains the sperm cells necessary for fertilization. The anther is typically located at the top of the stamen, the male part of the flower. It consists of two lobes that contain pollen sacs, where the pollen grains are produced. The anther plays a crucial role in the process of pollination, as it allows for the transfer of pollen from the male flower to the female flower, leading to the formation of seeds and fruits.