Guinness World Records (General Knowledge Focus) MCQs with Answers & Explanations (Page 482)

Explanation Omnivores can be both secondary and tertiary consumers, depending on their diet and position in the food chain. They can eat primary consumers (herbivores) as secondary consumers, and also eat secondary consumers (other carnivores or omnivores) as tertiary consumers.

Explanation Omnivores are consumers that eat both producers (plants and algae) and consumers (other animals). They have a varied diet that includes both plant and animal matter. Examples of omnivores include humans, bears, pigs, and chimpanzees.

Explanation Wolf is a tertiary consumer because it eats both primary consumers (mice) and secondary consumers (cats) .

Explanation Tertiary consumers are animals that eat primary and secondary consumers. They are typically apex predators that have no natural predators in the wild and are at the top of their food chain. Examples of tertiary consumers include lions, sharks, bears, and humans.

Explanation Cat is a secondary consumer because it eats primary consumers ( birds and mice ). Which are herbivores that eat plants and plant products.

Explanation Carnivores are secondary consumers that eat primary consumers (herbivores). In this case, birds and mice are primary consumers (herbivores) that eat plants and plant products. Carnivores that eat birds and mice are secondary consumers. Examples of carnivores that might eat birds and mice include: Hawks and owls (birds of prey) Foxes, wolves, and cats (mammals) Snakes and lizards (reptiles)

Explanation Secondary consumers are animals that eat primary consumers (herbivores). They are carnivores that feed on the animals that eat plants and plant products. Examples of secondary consumers include : Predators like lions, dogs, wolves, and hawks Fish that eat smaller fish or crustaceans Insects like ladybugs that eat aphids

Explanation Sheep and birds are primary consumers because they eat plants and plant products, such as grass, leaves, seeds, and fruits.

Explanation In the absence of sunlight, the entire food chain would become inactive and collapse because: Plants and algae, the primary producers, cannot undergo photosynthesis and produce energy. Herbivores cannot feed on plants, and carnivores cannot feed on herbivores. The energy flow from producers to consumers would be disrupted , leading to a collapse of the food chain.

Explanation Air is not a component of a food web , as it is not a living organism or a source of energy or nutrients for organisms in the web.

Explanation A food chain is a series of organisms that eat and are eaten by each other, showing the flow of energy and nutrients from one organism to another. It represents the relationship of eating and being eaten among organisms in an ecosystem.

Explanation Carnivores are animals that eat only meat , primarily from other animals. Examples of carnivores include lions, tigers, bears, wolves, and sharks.

Explanation Animals can be classified into three main categories based on their food type: Herbivores (plant-eaters): These animals eat only plants , including leaves, stems, roots, flowers, fruits, and seeds. Examples : Cows, Deer, Rabbits, Elephants Carnivores (meat-eaters): These animals eat only meat , primarily from other animals. Examples : Lions, Tigers, Bears, Wolves Omnivores (both plant and meat-eaters): These animals eat both plants and animals . Examples : Humans, Pigs, Bears (some species), Chimpanzees

Explanation Introducing mosquito-eating fish , such as guppies or mosquitofish (Gambusia affinis), into water bodies can help control mosquito populations , including the dengue mosquito (Aedes aegypti). These fish feed on mosquito larvae and help prevent them from developing into adult mosquitoes.

Explanation Iron Rock is a non-living component, an abiotic factor . It is not included in the living components of the land environment.

Explanation Animals, plants, human beings, and microorganisms are all examples of living components and biotic factors. Living components refer to the living organisms that make up an ecosystem or environment. Biotic factors refer to the living components of an ecosystem that interact with each other and their environment.

Explanation The environment refers to the natural world that surrounds us, including all living and non-living things. Such as plants, animals, water , air, soil, and sunlight.

Explanation Hygiene refers to the practice of maintaining cleanliness and purity to promote health and prevent disease. It includes habits such as washing hands regularly , bathing, brushing teeth, and wearing clean clothes.

Explanation Kwashiorkor is a disease that occurs when a diet has an inadequate amount of protein relative to carbohydrates, leading to an imbalance. This imbalance can cause swelling, fatigue, and poor growth , and typically affects older children.

Explanation Marasmus is a severe form of protein-energy malnutrition . It develops due to a lack of sufficient calories and essential nutrients. As a result of starvation, poverty, and inadequate food supply.