Explanation

Eutrophication occurs when excess nutrients from fertilizers enter water bodies, stimulating excessive plant growth and depleting oxygen, harming aquatic life.

This can lead to the formation of "dead zones" where few organisms can survive, degrading the ecosystem.

Explanation

Fertilizers are substances containing chemical elements that provide essential nutrients for plant growth, including:

• Nitrates (N) for leaf growth and development
• Phosphates (P) for root development, flower and fruit formation
• Potassium (K) for overall plant health and resistance to disease

Explanation

Seafood is an excellent source of protein because it is typically low in fats (lipids) and high in protein.

Many types of seafood, such as fish and shellfish, are lean sources of protein, making them a popular choice for those looking to reduce their fat intake.

Explanation

• Pepsin is a proteolytic enzyme produced by the chief cells in the stomach lining.
• It breaks down proteins into smaller peptides and amino acids, initiating protein digestion in the acidic environment of the stomach.

Explanation

• Glycolysis, the splitting of glucose, releases a small amount of energy that is enough to generate 2 ATP (adenosine triphosphate) molecules.
• This process occurs in the cytosol of cells and is the first step in cellular respiration.

Explanation

• The induced fit model proposes that the active site of an enzyme is flexible and changes shape until the substrate binds, much like a glove molding to fit a hand.
• This model suggests that the enzyme adapts to the substrate, rather than the substrate simply fitting into a pre-existing lock.

Explanation

• Non-disjunction is the phenomenon where a pair of homologous chromosomes (or a pair of sister chromatids) fails to separate properly during meiosis.
• Resulting in an abnormal number of chromosomes in the daughter cells.
• This can lead to genetic abnormalities, such as Down syndrome (trisomy 21), or other chromosomal disorders.

Explanation

Pinworm infection (Enterobiasis) is suspected, a common parasitic infestation in children presenting with perianal itching and potential weight loss due to discomfort

The disorder is spread by swallowing or inhaling the tiny eggs of the pinworm.

Explanation

• T = dominant allele (e.g., tall)
• t = recessive allele (e.g., short)

Explanation

In 1796, Edward Jenner successfully used material from cowpox to vaccinate against smallpox.

This was the first successful vaccination in medical history.