Science 1st 9 weeks Review

Which best describes why bacteria can survive in their environment without help from other organisms?

• because their cells are larger than cells of other organisms

• because they can carry out all necessary life processes

• because they are a specific kind of plant

• because they are multicellular

How does the circulatory system compare to the respiratory system?

• The respiratory system brings nutrients into the body, while the circulatory system moves the body.

• The respiratory system moves the body, while the circulatory system brings nutrients into the body.

• The respiratory system brings oxygen into the body, while the circulatory system moves oxygen through the body.

• The respiratory system moves oxygen through the body, while the circulatory system brings oxygen into the body.

Most plankton are single-celled organisms that float near the surface of ocean water. What other characteristic would these plankton most likely have?

• the ability to acquire the energy they need without the help of other cells

• the ability to attach to other plankton and help all other plankton survive

• the ability to survive without reproducing

• the ability to survive without removing waste

Which kind of ecosystem is a combination of salt water and freshwater?

• an estuary

• an ocean

• a lake

• a pond

A boy’s mother has blue eyes and dimples. His father has brown eyes and no dimples. How could the boy have brown eyes and dimples?

• because his traits were influenced by his home environment

• because he inherited traits from just one parent

• because his traits were determined by the foods he eats

• because he inherited traits from both parents

Which are parts of the respiratory system?

• heart and blood

• lungs and mouth

• muscles and nerves

• stomach and esophagus

The characteristics of two plants are shown below. Which characteristic most likely could not be inherited by the plants’ offspring?

• green leaves

• 15-cm stem

• green center

• orange petals

Why do the same kinds of trees have the same shape of leaves?

• They inherit the shape of their leaves from the parent trees.

• They receive the same kinds of nutrients from the soil.

• They grow in areas that receive the same amount of sun.

• They acquire the shape of their leaves from insects eating their leaves.

Some birds collect berries of plants in one area and carry them to another area to eat, dropping some. As a result, new plants with berries grow in the new areas. What can be concluded from this example?

• Birds harm plants by carrying away berries.

• Birds prevent the spread of plants in a new area.

• Some plant diseases are caused by birds removing berries from plants.

• Some plants increase the areas where they grow with the help of birds.

How are deer and wolves classified?

• as decomposers

• as consumers

• as carnivores

• as producers