DPM Questions

Which food chain best represents a transfer of energy within this food web?

• plants →  deer → birds → mountain lions

• snakes →  birds → grasshoppers → plants

• 
  plants → birds → raccoon → snakes

• plants → grasshoppers → frogs → raccoons

Many physical and chemical changes occur throughout the process of digestion. Which of the following best describes a chemical change during digestion?

• The muscles of the esophagus contract, pushing food along the tube to the stomach.

• The stomach releases gastric acid which mixes with the food and begins to break down proteins.

• The teeth grind the food down to smaller pieces.

• The large intestine removes water from the food.

The picture provided represents one of the systems in the human body. Parts of the system are labeled.Which statement best describes the function of this body system? This body system–

• 
  moves the body using energy released by the mitochondria

• 
  

  breaks down matter into nutrients needed by the body

• protects organs of the many body systems

• delivers nutrients, oxygen, and water to all body cells

The graphs show the populations of rabbits with four different fur colors in one area. Graph A represents the populations of rabbits 10 years ago. Graph B represents the population of rabbits today.

At the end of the 10-year period, which color of rabbits appears best adapted to their environment?

 

 

• White

• Tan

• Gray

• Black

A plant and a magnified view of one of its cells is pictured below.

Which of the following statements most accurately describes its current condition?

• 
  a high force of turgor pressure is causing the plant to stand upright.

• 
  

  a low force of turgor pressure is causing the plant to wilt.

• 
  

  a high force of turgor pressure is pressing against the cell wall.

• a low force of turgor pressure is caused by overwatering the plant.

Animal and plant cells have organelles that carry out specialized functions. A student was given the drawing below of a plant and animal cell and asked to label some of the organelles in the drawing provided.

 

 

Which statement describes the function of both the chloroplasts and the mitochondria? 

Chloroplasts and mitochondria–

• convert energy in the cell

• transport and store water in the cell

• remove wastes for the cell

• maintain internal balance in cells

Why is it important to conserve the biodiversity of Earth?

• to decrease the amount of global predator populations 

• to decrease the stability of major global ocean currents 

• to increase the stability of ecosystems during environmental changes

• to increase the amount of nonrenewable resources located in the lithosphere

Several years after a building had been torn down and the ground cleared, grasses began to grow in that area. After 10 years, small bushes replaced the grasses. This pattern of plant growth is known as—

• 
  biological control

• 
  

  ecological succession

• land-use management 

• 
  

  cover cropping

A student builds a model to show how pollutants move through an ecosystem. In a plastic tub, the student places a layer of small marbles, covers it with a thick cloth, and then adds a layer of sand. The student then sprinkles red powdered paint on the top of the soil. When the student sprays water onto the model, red color appears in the cloth and in the water in the layer of marbles.

 

Which part of the model represents pollutants introduced by humans?

 

Select ONE correct answer.

• Layer of Sand

• Red Paint

• Thick Cloth

• Marbles

Which statement best describes how blood circulates through the human body?

• The movement of the stomach pushes blood to all parts of the body.

• The exchange of gases within the lungs forces blood to move forward within the blood vessels.

• The contraction of arm and leg muscles pump blood throughout the entire body.

• The pumping action of the heart pushes blood through the blood vessels to all parts of the body.