Biology Midterm Review

The growth of plants in many ecosystems is limited by the supply of nitrogen. This group of organisms plays the largest role in moving moving nitrogen between atmosphere and plants.

Bacteria

Photosynthesis and cellular respiration are the same because they both require specific.

Enzymes or catalysts

This is the role of photosynthesis in the carbon cycle.

It removes carbon dioxide from the atmosphere

Invasive species harm a food chain because.

They take resources away from native species.

This determines whether a relationship is mutualism, parasitism, or commensalism.

Whether the impact is positive, negative, or neutral

In some parts of the world, forests are being cut down and burned to clear land for new homes and new farmland. A negative effect of these activities might be.

an increase in global climate change

The energy used to obtain, transfer, and transport materials within an organism comes directly from

atp

This removes nitrates from a food web.

bacteria

Removing invasive plants will help to maintain this.

biodiversity

This human activity contributes to the excess release of carbon dioxide in the atmosphere

burning of fossil fuels

These are the two main elements cycled through the processes of photosynthesis and cellular respiration.

carbon and oxygen

A student places four small aquatic snails in a test tube containing bromothymol blue solution. The solution will change color from blue to yellow if the carbon dioxide if the carbon dioxide level increases. The student seals the test tube and notes that the solution is blue. After a few hours, the student observes that the solution is yellow. This is the cellular process that the snails performed that caused the color change.

cellular respiration

This molecule is necessary to perform photosynthesis in the initial step.

chlorophyll

Stability within an ecosystem is achieved partially by the presence of organisms that break down important molecules and make them available for other organisms to use.

decomposers

The openings on the underside of a leaf are responsible for this.

gas exchange

Removing carbon dioxide from a plant's environment will show a decrease in this.

glucose production

A death rate equal to birth rate will affect the population size in this way.

it will remain stable

A bee eating nectar and pollinating flowers are an example of.

mutualism

this process uses energy to combine inorganic molecules to synthesize organic molecules.

photosynthesis

This type of organism is at the bottom of energy pyramids.

producers

Sharks are often followed by smaller fish that eat some of the scraps from the organisms eaten by the shark. These smaller fish are acting as.

scavengers

This provides energy for organisms but does not appear in a food web.

sun/sunlight