Characteristics of Life

Responding to the environment is a characteristic of life best shown by which example?

• a human shivers on a cold day

• a horse trots in a field

• a dog swims in a pond

• a cat licks its paws

Organisms may contain up to five levels of organization within their bodies. Which level of organization is best represented by the liver?

• tissue

• organ

• organism

• organ system

The heart is an example of which level of organization within an organism?

• cell

• organ

• tissue

• organ system

Organisms contain different levels of organization within their bodies. Arachnoidiscus ehrenbergi, pictured below, is a single-celled organism that is part of the group of algae known as diatoms.

Which level of organization is seen in both Arachnoidiscus ehrenbergi and the human stomach?

• cell

• tissue

• organ

• organ system

Which characteristic of life best describes the life cycle of a frog?

• having cells

• using energy

• responding to the environment

• growing and developing

How were Redi’s and Pasteur’s experiments different?

• Redi studied broth, but Pasteur tested meat.

• Pasteur studied flies, but Redi tested meat.

• Pasteur tested for microorganisms, but Redi studied larger organisms.

• Redi tested for microorganisms, but Pasteur studied larger organisms.

Which is one of the five characteristics of life?

• having organs

• containing tissues

• growing and developing

• spontaneously generating

Which characteristic of life best describes the process of homeostasis?

• responding to the environment

• reproducing

• growing and developing

• using energy

Which characteristic of life best describes the process of photosynthesis?

• using energy

• containing cells

• reproducing

• growing and developing

Sweating when it is hot outside is an example of which characteristic of life?

• responding to the environment

• using energy

• reproducing

• growing and developing