characteristics of cell and living things

How do living things compare to nonliving things at a microscopic scale?

• On a microscopic scale, living things and non living things are made up of cells.

• On a microscopic scale, nonliving things are more complex than living things. However, living things can grow and nonliving things cannot.

• On a microscopic scale, only living things are made up of cells, but both living and nonliving things have structures that can be seen with a microscope.

How do human organs compare to each other at a microscopic scale?

• On a microscopic scale, the cells of human organs have different shapes and sizes and have different specialist roles.

• On a microscopic scale, the cells of human organs have different sizes, but are all the same shape.

• On a microscopic scale, the cells of human organs are all the same size, but have different shapes.

This part gives plant cells a rigid structure.

• Cell wall
• Organelle
• Chloroplast
• Cytoplasm

This part gives plant cells a rigid structure.

• Cell wall
• Organelle
• Chloroplast
• Cytoplasm

The starch indicator...

• Diffuses into to the cell
• Diffuses out of the cell
• Stays where it is

In single-celled organisms, materials are stored primarily in

• ribosomes

• mitochondria

• nuclei

• vacuoles

An ameba is a single-celled, heterotrophic organism. In order to meet its energy needs, it relies directly on the interaction of which cell structures?

• chloroplasts and the cell membrane

• the cell membrane and mitochondria

• nucleus and ribosomes

• vacuoles and the nucleus

Recently, oil from a wrecked tanker resulted in a disaster in ecosystems containing many unique species. The potential loss of these species could result in

• an increase in the variety of genetic material available

• a decrease in organisms available for scientific research

• an increase in the stability of the affected ecosystems

• a decrease in pollution affecting the land and water

Which process occurs at each link in a food chain?

• All the energy is stored in a newly made structure.

• Some energy is released into the environment as heat.

• Chemical energy is recycled.

• Atoms cycle among living organisms, producing energy.

The diagram illustrates the release of chemical A from a human cell in response to a specific stimulus.

Which cell structure plays a direct role in the release of this chemical from the cell?

• nucleus

• ribosome

• chloroplast

• cell membrane