Biology Unit 3- Cells

What is the primary purpose of photosynthesis in plants?

• To produce oxygen for animals

• To capture and store energy from sunlight

• To absorb carbon dioxide from the atmosphere

• To convert glucose into starch

Which of the following statements best supports the cell theory?

• All cells have a nucleus.

• Cells are the basic unit of structure and function in living organisms.

• Cells can only be seen with a microscope.

• All cells are capable of photosynthesis.

How do unicellular organisms maintain homeostasis?

• By forming complex tissues

• Through specialized organ systems

• By regulating internal conditions through cellular structures

• By relying on other cells for support

What is the role of the cell membrane in cell transport?

• It provides energy for cellular activities.

• It acts as a barrier to all substances.

• It regulates the movement of substances in and out of the cell.

• It stores genetic information.

What is the result of cell specialization in multicellular organisms?

• All cells perform the same function.

• Cells develop into different types with specific functions.

• Cells lose their ability to divide.

• Cells become identical in structure.

Which process is directly involved in the transformation of energy during photosynthesis?

• Glycolysis

• Calvin cycle

• Krebs cycle

• Electron transport chain

Which evidence supports the cell theory?

• The discovery of DNA

• The observation of cell division

• The presence of mitochondria in cells

• The ability of cells to photosynthesize

How do multicellular organisms maintain homeostasis?

• By using a single type of cell for all functions

• Through the interaction of various organ systems

• By relying solely on external environmental conditions

• By having a uniform internal environment

What is a key feature of the cell membrane that supports its function in transport?

• Its rigid structure

• Its impermeability to water

• Its selective permeability

• Its ability to conduct electricity

What is the significance of cell specialization in the human body?

• It allows for the formation of a single type of tissue.

• It enables the body to perform a wide range of functions.

• It limits the body's ability to adapt to changes.

• It causes all cells to become identical.