Study of Life (Chap. 1)

John is studying biology and he came across a rock. He knows that it's not a living organism. The following are all characteristics of living things/organisms except which one?

• Reproduces

• Requires energy

• consumes carbohydrates

• maintains homeostasis

Answer explanation

The correct choice is 'consumes carbohydrates' because not all living organisms require carbohydrates. The other options—reproducing, requiring energy, and maintaining homeostasis—are essential characteristics of living things.

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Which best describes adaptation?

• Reproducing as a species

• A short-term change in behavior in response to stimul

• Inherited changes in response to environmental factors

• Change in size as an organism ages

Answer explanation

Adaptation refers to inherited changes in a species over generations in response to environmental factors, allowing them to survive and reproduce more effectively. This distinguishes it from short-term behavioral changes.

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Which is a testable explanation?

• Dependent Variable

• Independent Variable

• Hypothesis

• Observation

Answer explanation

A hypothesis is a testable explanation that can be investigated through experiments or observations. It proposes a relationship between variables, making it distinct from dependent and independent variables or mere observations.

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This is an explanation of a natural phenomenon supported by many observations and experiments over time.

• Theory

• Law

• Science

• Hypothesis

Answer explanation

A theory is an explanation of a natural phenomenon that is well-supported by extensive observations and experiments. Unlike a hypothesis, which is a testable prediction, a theory has withstood rigorous testing and is widely accepted.

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The study of life

• Biology

• Zoology

• Archaeology

• Ecology

Answer explanation

Biology is the scientific study of life and living organisms, making it the correct answer. Zoology focuses specifically on animals, archaeology studies human history, and ecology examines interactions within ecosystems.

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Maintaining a stable internal environment

• Homeostasis

• Stimulus

• Asexual reproduction

• DNA

Answer explanation

Homeostasis refers to the process by which living organisms maintain a stable internal environment despite external changes. This is essential for survival and is the correct answer to the question.

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Imagine you are observing a worm in your garden. You notice that the worm is turning away from the sunlight. This is an example of the worm

• Reproducing

• Having cells

• Doing cellular respiration

• Responding to its environment

Answer explanation

The worm turning away from sunlight demonstrates its ability to respond to environmental stimuli, which is a key characteristic of living organisms. This behavior indicates it is reacting to its surroundings.

Tags

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List the levels of organization in order from smallest (simplest) to most complex

• tissues, organ systems, organism, cells, organ

• cells, organ systems, tissues, organ, organism

• cells, tissues, organ, organ systems, organism

• organism, cells, tissues, organ systems, organ

Answer explanation

The correct order of organization is from smallest to most complex: cells, tissues, organ, organ systems, and finally organism. This reflects the hierarchical structure of biological organization.

In an experiment, all variables are held constant except for one. Then, experimental results are compared to that one variable. What type of experiment is this?

• a variable experiment

• a multifactor experiment

• a controlled experiment

• a hypothetical experiment

Answer explanation

This is a controlled experiment because it involves keeping all variables constant except for one, allowing for a clear comparison of the effects of that single variable on the experimental results.

What are the two types of reproduction?

• There is only one

• Asexual and Sexual

Answer explanation

The two types of reproduction are asexual and sexual. Asexual reproduction involves a single organism producing offspring without the involvement of gametes, while sexual reproduction involves the fusion of gametes from two parents.

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