Explanation

• Decomposers are organisms that break down dead and waste products of producers and consumers, releasing nutrients back into the environment.
• Examples of decomposers include bacteria, fungi, and detritivores like earthworms and insects.

Explanation

• If the number of frogs increases, it is likely that the number of snakes would decrease.
• This is because snakes are predators that feed on frogs, and an increase in frog population would lead to a decrease in snake population due to competition for resources and potential overgrazing.

Explanation

• Frogs are heterotrophic animals that obtain energy by consuming other organisms, such as insects, worms, and even smaller frogs.
• They do not produce their own food like plants (producers) do, and they do not break down dead organisms like decomposers (such as bacteria and fungi) do.
• Therefore, the best description for a frog is a consumer.

Explanation

Cyanosis in the tetralogy of Fallot is primarily due to the combination of the four defects, with pulmonary stenosis playing a crucial role.

Pulmonary stenosis restricts blood flow to:

• the lungs
• increasing pressure in the right ventricle 
• leading to a right-to-left shunt through the ventricular septal defect

This shunt allows deoxygenated blood to enter the systemic circulation, causing cyanosis.

Explanation

Signet ring cells are a hallmark of certain types of gastric cancer

Specifically signet ring cell carcinoma

Explanation

The correct order of the levels in a food chain is:

• Producer (plants and algae that produce their own food through photosynthesis)
• Consumer (animals that eat producers or other consumers)
• Decomposer (organisms like bacteria and fungi that break down dead plants and animals)

Last updated 17-02-2026

Explanation

• Human beings are omnivores because we eat a variety of foods including plants (fruits, vegetables, grains), animals (meat, poultry, fish), and products derived from animals (dairy, eggs).

Explanation

A direct inguinal hernia occurs when the intestines protrude through the Hesselbach triangle into the inguinal canal

A short passageway in the anterior abdomen which allows structures to transverse the abdominal wall to the external genitalia.

Explanation

 Hypoproteinemia refers to low levels of protein in the blood

Which can occur due to massive loss of protein in the urine (proteinuria) characteristic of nephrotic syndrome

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.