Science CBA# 4 2025 Quiz

What are simple cells that do not have a nucleus called?

• Eukaryotic cells

• Prokaryotic cells

• Multicellular organisms

• Unicellular organisms

What is a biotic factor in a river ecosystem?

• The types of microorganisms that live in the river water.

• The temperature of the river water.

• The amount of sunlight that reaches the river.

• The flow rate of the river.

Define biotic factors.

• Non-living components of an ecosystem, such as water and minerals.

• Living components of an ecosystem, such as plants, animals, and microorganisms.

• The physical environment in which organisms live.

• The interactions between different species in an ecosystem.

Who named the cell after looking at cork?

• Robert Hooke

• Anton van Leeuwenhoek

• Louis Pasteur

• Gregor Mendel

What did the invention of the microscope allow people to discover?

• Atoms

• Cells

• Molecules

• Tissues

What is the function of a microscope?

• To magnify small objects, allowing us to see cells and microorganisms.

• To illuminate objects with bright light.

• To measure the temperature of small samples.

• To analyze chemical compositions of substances.

What is the significance of Robert Hooke's discovery?

• He was the first to identify and name cells.

• He discovered the circulation of blood.

• He invented the microscope.

• He proposed the theory of evolution.

What is the relationship between light intensity and plant growth?

• Low light intensity can limit the growth of plants.

• High light intensity always promotes plant growth.

• Light intensity has no effect on plant growth.

• Plants grow best in complete darkness.

How do abiotic factors affect biotic factors?

• They have no effect on living organisms.

• They influence the survival, growth, and reproduction of living organisms.

• They only affect the physical environment.

• They are only important for plant life.

What is the difference between prokaryotic and eukaryotic cells?

• Prokaryotic cells have a nucleus; eukaryotic cells lack a nucleus.

• Prokaryotic cells are larger than eukaryotic cells.

• Prokaryotic cells lack a nucleus; eukaryotic cells have a nucleus.

• Prokaryotic cells are more complex than eukaryotic cells.