2nd 9 weeks REVIEW 2020

Scientists are investigating processes that happen during digestion. Which answer choice describes only a physical change during digestion?

• chewing food

• stomach absorbing nutrients using enzymes

• Saliva with enzymes breaking down food

• Changing sugar into glucose

Julia was out of the office for a couple of days and when she returned, she noticed that her plant was very wilted. She watered the plant and put it in the sun. A few hours later, she noticed that the leaves on the plant had perked up and looked fine again. What happened?

• The plant doesn't need water to survive

• Plants need water, carbon dioxide, and sunlight to undergo photosynthesis.

• Plants need to hunt for there food.

• The plant didn't get enough sunlight.

A damaged cell is having trouble breaking down and removing unwanted waste from the cell after the cell has metabolized. Which organelle is most likely responsible?

• Lysosome

• Chloroplast

• Nucleus

• Esophagus

What would happen if a nerve cell stopped functioning?

• Messages would not be sent to the brain

• Water would escape the cell

• Photosynthesis can occur

• Hormones would move even faster

What happens to a leaf when it has lost much needed water?

• Turgor Pressure Increases

• Turgor Pressure Decreases

• The plant will survive without water forever

• Photosynthesis will be faster

Forces affect motions in living and nonliving things. In a human, swallowed food moves down the esophagus into the stomach, even if the human is upside down doing a handstand. Which force moves food through the esophagus into the stomach?

• Magnetic force in the stomach pulls food through the esophagus into the stomach.

• Push force from contractions of the esophagus moves food through the esophagus.

• Gravitational force pulls food through the esophagus.

• None of the above

During exercise, the cardiovascular system works together with the respiratory system to

• get rid of waste

• get rid of carbon dioxide

• Absorb energy from food

• Make us sweat

How do growing plants exhibit positive gravitropism?

• The roots grow upwards

• The stem grows downwards

• The roots grow downwards

• The flowers bloom

Which statement best describes changes to food during digestion?

• The muscle contractions and the action of the peptidase both result only in chemical changes.

• The muscle contractions result in physical changes, while the action of the peptidase results in chemical changes.

• The muscle contractions result in chemical changes, while the action of the peptidase results in physical changes.

• The muscle contractions result in chemical changes, while the action of the peptidase results in physical changes.

Why is the most likely reason for the direction of the plant growth?

• It was tired

• Geotropism because the shoot system wants to grow upwards

• Loss of Turgor Pressure

• The light was underground