Explanation

Peristalsis is a wave of rhythmic movements of muscle contraction and relaxation that helps move substances through a tubular structure, like the digestive tract.

It's a vital process that facilitates the transport of food, water, and waste products through the digestive system.

Explanation

Iron deficiency is associated with decreased cognitive abilities and resistance to diseases.

Iron plays a crucial role in the immune system, and deficiency can impair the body's ability to fight off infections.

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

One mole of glucose (180g) produces a maximum of 2827 kJ (kilojoules) of energy through cellular respiration.

This energy is released as ATP (adenosine triphosphate) and is used to power various cellular activities.

Explanation

The breakdown of food molecules to release energy is called cellular respiration.

This process involves breaking down glucose and other molecules in the presence of oxygen to produce energy in the form of ATP (adenosine triphosphate).

Cellular respiration occurs in the mitochondria of cells.

Explanation

Chloroplasts contain various pigments like chlorophyll, carotenoids, and phycobiliproteins, which absorb light of different wavelengths.

This allows plants to capture a broad spectrum of light energy and use it for photosynthesis.

Explanation

Chloroplasts are double membrane-bound organelles found in plant cells and some algae, responsible for photosynthesis.

The stroma is the semifluid protein-containing region within the chloroplast where light-dependent reactions occur.

Explanation

Photosynthesis splits water molecules (H2O) into oxygen (O2) and hydrogen ions (H+), releasing oxygen as a byproduct.

This process is essential for life on Earth, as it provides the oxygen that supports aerobic respiration in most living organisms.

Explanation

Food chains are linear sequences showing the feeding relationships between organisms in an ecosystem.

They illustrate how energy and nutrients are passed from one organism to another, from producers (like plants) to consumers (like animals).

Explanation

Plants, algae, and some bacteria use photosynthesis to convert simple inorganic molecules like carbon dioxide (CO2) and water (H2O) into glucose (a type of sugar) and oxygen (O2).

This process is essential for life on Earth, as it provides energy and organic compounds for food chains.