Autotrophs are organisms that can produce their own food using simple inorganic sources such as carbon dioxide and water, while heterotrophs rely on consuming complex substances from other organisms for energy and materials.

The body converts the energy stored in food molecules (such as carbohydrates, fats, and proteins) into adenosine triphosphate (ATP), the primary energy currency used by cells to fuel metabolic processes and sustain life.

Without sufficient food intake, the body may lack the energy and nutrients needed for proper functioning, leading to fatigue, impaired growth and development, weakened immune function, and other health complications.

Food serves as a source of energy, supplying the body with calories that are converted into usable energy for various physiological processes. Additionally, food provides essential nutrients required for growth, development, and the synthesis of proteins and other substances necessary ...

Both walking and cycling require energy for muscle movement and propulsion, illustrating the expenditure of energy during physical activities.

Professional biologists consider molecular movement necessary for life because it underpins essential processes such as cellular organization, metabolism, and maintenance of cellular structures.

Besides movement, other criteria for identifying life include cellular organization, metabolism, homeostasis, reproduction, and adaptation to the environment. These criteria collectively provide a more comprehensive understanding of what constitutes life.

Yes, because some organisms, like plants, may exhibit minimal or imperceptible movement yet remain alive. Additionally, certain animals may exhibit vital functions such as respiration without overt movement.

Movement, whether it’s locomotion in animals or growth in plants, is often associated with living organisms as it reflects metabolic activity and responsiveness to the environment.

Observable movement, growth, reproduction, and responsiveness to stimuli are commonly considered indicators of life.