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This exam was created by a large language model. Please use it with caution, as inaccuracies may be present. Always verify critical information.

Which organelle is responsible for controlling the cell's activities and contains the genetic material?

Select one option

Mitochondria

Ribosome

Nucleus

Cell membrane

Which part of a plant cell is responsible for photosynthesis?

Select one option

Cell wall

Vacuole

Chloroplast

Mitochondria

What is the primary function of the mitochondria in a cell?

Select one option

To store water

To release energy for the cell to use

To build proteins

To provide support to the cell

Which of the following correctly lists the levels of organization in a living organism from simplest to most complex?

Select one option

Organs, tissues, cells, organ systems, organism

Cells, organs, tissues, organ systems, organism

Cells, tissues, organs, organ systems, organism

Tissues, cells, organs, organ systems, organism

What is a gene?

Select one option

A type of protein

A segment of DNA that codes for a specific trait

A structure found in the cytoplasm

A type of sugar molecule

Which statement best describes heredity?

Select one option

Heredity is the process of cell division.

Heredity is the ability of an organism to adapt to its environment.

Inherited traits are passed from parents to offspring

Heredity is the process by which organisms produce their own food.

In genetics, what does the term 'genotype' refer to?

Select one option

The observable physical characteristics of an organism

The combination of alleles for a specific gene

The process of genetic mutation

The type of habitat an organism lives in

Which of the following best describes natural selection?

Select one option

All organisms in a population are exactly alike.

Traits that are more beneficial for survival in a given environment become more common in a population over time.

Organisms choose which traits they want to pass on to their offspring.

Natural selection always results in larger and stronger organisms.

What is evolution?

Select one option

A sudden change in an individual organism

The process of becoming extinct

A gradual change in a species over long periods of time

The development of an embryo

10.

Charles Darwin observed different types of finches on the Galapagos Islands. What was a key observation that led to his theory of natural selection?

Select one option

All finches on the islands had identical beak shapes.

Finches with different beak shapes adapted to different food sources on the islands.

The finches migrated between islands annually.

The finches only ate one type of food.

11.

What is an ecosystem?

Select one option

A group of organisms of the same species

All the living things in an area

All the nonliving things in an area

All the living and nonliving things in an area

12.

In a food chain, an organism that makes its own food using sunlight is called a(n):

Select one option

Consumer

Decomposer

Producer

Scavenger

13.

An animal that only eats plants is classified as a(n):

Select one option

Carnivore

Omnivore

Herbivore

Decomposer

14.

Which two products are produced during photosynthesis and are used by animals for survival?

Select one option

Carbon Dioxide and Water

Oxygen and Glucose

Nitrogen and Water

Sunlight and Chlorophyll

15.

Which of the following is an example of an abiotic factor in an ecosystem?

Select one option

Predation by a fox

Disease spread among deer

Competition for resources

Sunlight intensity

16.

Which human body system is responsible for breaking down food into nutrients that the body can use?

Select one option

Circulatory system

Respiratory system

Nervous system

Digestive system

17.

In the human respiratory system, where does the exchange of oxygen and carbon dioxide take place?

Select one option

Heart

Stomach

Lungs

Kidneys

18.

The central nervous system is made up of which two main organs?

Select one option

Heart and lungs

Stomach and intestines

Brain and spinal cord

Muscles and bones

19.

Which body system provides support, protection, and allows for movement?

Select one option

Circulatory system

Muscular system

Skeletal system

Endocrine system

20.

In the scientific method, what is a hypothesis?

Select one option

A conclusion drawn from an experiment

A testable statement or prediction

The final result of an experiment

A question that cannot be answered

21.

What is a dependent variable in an experiment?

Select one option

The variable that is changed by the experimenter

The variable that stays the same throughout the experiment

The variable that is measured or observed

A factor that is not important to the experiment

22.

Why is it important to have a control group in an experiment?

Select one option

To make the experiment longer

To ensure that any observed changes are due to the independent variable

To confuse the experimenter

To get more accurate results from the dependent variable

23.

When using a light microscope, which of the following is the correct procedure for focusing?

Select one option

Always start with the highest power objective lens.

Use the coarse adjustment knob with all objective lenses.

Use the coarse adjustment knob only with the lowest power objective lens.

Adjust the diaphragm before looking through the eyepiece.

24.

If the eyepiece (ocular lens) of a microscope has a magnification of 10x and the objective lens being used has a magnification of 40x, what is the total magnification?

Select one option

10x

40x

50x

400x

25.

Which part of the microscope controls the amount of light passing through the specimen?

Select one option

The stage clips

The objective lens

The diaphragm

The fine adjustment knob

26.

Observing that a plant's leaves turned yellow is an example of collecting what type of data?

Select one option

Quantitative data

Qualitative data

Hypothetical data

Inferential data

27.

What is the purpose of the 'Conclusion' section in a scientific report?

Select one option

To list all the materials used.

To describe the detailed procedure of the experiment.

To present raw data in tables.

To explain the results and relate them back to the hypothesis.

28.

Why is it important for scientists to share their findings?

Select one option

To allow other scientists to replicate experiments.

To build on existing knowledge.

To receive feedback and peer review.

All of the above

A student wanted to test how light affects the growth of pea plants. They took two identical pea plants, Plant A and Plant B. Plant A was placed in a window (receiving sunlight), and Plant B was placed in a dark closet. Both plants received the same amount of water and were kept at the same temperature. After two weeks, the student measured the height of each plant.

Results:

Plant A (Light): 15 cm
Plant B (Dark): 3 cm

29.

Identify the independent variable and the dependent variable in this experiment.

30.

Based on the experiment described above, if Plant A grew to 15 cm and Plant B grew to 3 cm, what conclusion can the student draw about the effect of light on pea plant growth?

Microscope Observation Scenario

You are examining a cheek cell under a light microscope. You have successfully focused the cell under the 10x objective lens. Now you want to see more detail by switching to a higher magnification.

31.

Imagine you are observing a single-celled organism under a microscope using the 10x objective lens. If you switch to the 40x objective lens without making any other adjustments, what changes would you expect to see in the field of view and the appearance of the organism?

32.

Explain the process of natural selection and provide a real-world example of how it can lead to changes in a population over time. Be sure to include the key components involved in natural selection.

33.

Describe the main function of the human circulatory system. List its primary components and explain how they work together to perform this function.

34.

Discuss at least three ways human activities can negatively impact ecosystems. For each impact, provide a brief explanation of how it affects living organisms and their environment.