Basic Concepts in Biology and Science

Biology mainly focuses on the study of.....

• Life

• Air

• Water

• Earth

Answer explanation

Biology is the scientific study of life and living organisms. It encompasses various aspects of life, including structure, function, growth, and evolution, making 'Life' the correct focus of biology.

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Science deals with the _______ world only.

• Natural

• Imaginary

• Virtual

• Mythical

Answer explanation

Science deals with the natural world, focusing on observable phenomena and laws of nature. The other options, such as imaginary, virtual, and mythical, do not pertain to the empirical study that defines scientific inquiry.

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Scientific explanations for natural phenomena should always be ________.

• Testable

• Imaginary

• Unpredictable

• Unprovable

Answer explanation

Scientific explanations for natural phenomena must be testable to ensure they can be verified through experiments and observations. This distinguishes them from imaginary or unprovable ideas, which lack empirical support.

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All things classified as living must have at least one of these.

• Brain

• Cell(s)

• Atom

• Molecule

Answer explanation

All living things are made up of cells, which are the basic units of life. While atoms and molecules are essential components, they do not define life. Therefore, 'Cell(s)' is the correct answer.

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Which two things do all cells on Earth have in common?

• All have a membrane

• All contain DNA or RNA

• All contain a cell nucleus

• All the same size

Answer explanation

All cells on Earth share two key features: they all have a membrane that encloses their contents and they all contain genetic material, either DNA or RNA, which is essential for life.

Evolution in life simple means ______ over time.

• change

• stability

• repetition

• stagnation

Answer explanation

Evolution refers to the process of change in living organisms over time. Therefore, the correct answer is 'change', as it encapsulates the essence of evolution, contrasting with stability, repetition, and stagnation.

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The ultimate energy source for most ecosystems on Earth comes from the ....... (3 letters)

• Sun

• Air

• Oil

• Ice

Answer explanation

The ultimate energy source for most ecosystems on Earth is the Sun. It provides the light and heat necessary for photosynthesis, which is the foundation of food chains in ecosystems.

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What is the basic unit of structure and function in all living things?

• Cell

• Organ

• Tissue

• Organism

Answer explanation

The cell is the fundamental unit of life, responsible for all biological processes. It is the smallest structure that can perform all functions necessary for life, making it the basic unit of structure and function in all living things.

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Which process do living things use to maintain a stable internal environment?

• Evaporation

• Photosynthesis

• Fermentation

• Homeostasis

Answer explanation

Homeostasis is the process by which living things regulate their internal environment to maintain stability, despite external changes. This includes temperature regulation, pH balance, and other vital functions.

​ Data collected through observations by counting or measuring (numerical data)

• Qualitative

• Quantitative

• Observations

• Data

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