Living Environment Regents Ecology

In the 1660s, Flemish physician Jan van Helmont grew a small willow tree in a pot of soil. He added only water to the pot. At the end of five years, he found that the tree had gained 75 kilograms, but there was very little change in the mass of the soil. Van Helmont concluded that the plant gained weight directly from the water. We now know that this conclusion is only partially correct because, in addition to water, photosynthesis also requires

• oxygen from the atmosphere

• carbon dioxide from the atmosphere

• proteins from animal prey

• carbohydrates from the soil

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which statement describes a failure of homeostasis in humans?

• When activity in an individual increases, the body temperature rises and the individual sweats.

• As the concentration of carbon dioxide increases in the human body, the lungs begin to expel more carbon dioxide.

• A viral infection leads to a decrease in the number of white blood cells being produced in the body.

• After an individual gets a cut, certain chemical changes begin the healing process.

Tags

NGSS.HS-LS1-3

Substance X directly supplies energy for various life functions, as shown in the diagram below. Which substance is represented by X in the diagram?

• ATP

• DNA

• starch

• glucose

Doctors sometimes use a vaccine to prepare the body to defend itself against future infections. These vaccines most often contain

• antibodies

• antibiotics

• white blood cells

• weakened pathogens

What is the process of converting sunlight into chemical energy called?

• solarization

• light-to-chemical conversion

• photosynthesis

• sunlightification

Tags

NGSS.MS-LS1-6

What is the substance the enzyme works on called?

• Substrate

• Product

• Active Site

• Complex

Name the most important inorganic compound to living things…

• Carbon Dioxide

• Oxygen

• Glucose

• Water

What happens when enzymes are heated to a high temperature?

• The enzymes die.

• The shapes of the enzyme are altered or denatured

• The enzymes' amino acid sequence changes.

• The enzymes remain the same

Do all systems work together to keep you in a state of homeostasis?

• True

• False

• Both true and false

• Some work together and some do not

Tags

NGSS.MS-LS1-3

molecules small enough to pass through the pores of cell membranes can passively leave the digestive system and enter the blood through what process?

• diffusion

• active transport

• photosynthesis

• cellular respiration

Tags

NGSS.MS-LS2-3