Science final fall

Question 1

Justify the statement “Cellular respiration cannot occur without photosynthesis”.

Answer 1

Cellular respiration requires glucose , which is created through photosynthesis.

Question 2

Explain why heterotrophs are important to the food chain.

Answer 2

They only transfer energy up the food chain.

Question 3

What are the roles of keystone species in an ecosystem?

Answer 3

It depends. Keystone species help define an entire ecosystem.

Question 4

What often happens when the Predator population decreases?

Answer 4

The prey population is likely to increase until their food supply runs low

Question 5

Freshwater run-off and pollution create large amounts of algae, called “algae blooms” that live near the surface of the water. Predict the effect of an overgrowth of algae to a coral reef.

Answer 5

Too much algae will cause the coral to die.

Question 6

What components (parts) can be found in all ecosystems?

Answer 6

abiotic (water, light, soil, air) biotic (animals, insects, plants)

Question 7

Which way does the energy move in an ecosystem?

Answer 7

The energy moves toward the organisms that is doing the consuming.

Question 8

Plants use glucose (C6H12O6) molecules as a reactant in the chemical reaction that produces,_______________, which is the main constituent of plant cell walls.

Answer 8

cellulose

Question 9

What is glucose?

Answer 9

sugar

Question 10

what is the formula for cellular respiration?

Answer 10

C6H12O6 + 6O2 –> 6H2O + 6CO2

Question 11

If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars?

Answer 11

no sugars would be produced

Question 12

What is the process that breaks down food/glucose?

Answer 12

Cellular Respiration

Question 13

What are the waste products of cellular respiration that are the reactants of photosynthesis?

Answer 13

Carbon Dioxide and water

Question 14

If you increase the amount of space for the American Bison, what will happen to the carrying capacity of the American Bison.

Answer 14

The carrying capacity will increase due to having more food resources.

Question 15

An energy pyramid consists of four trophic levels. The carnivores in the top trophic levels require 5,000 kcalories per day.

How many kcalories per day do the primary consumers need to provide for the carnivores to reach their requirement?

Answer 15

500,000

Question 16

What are the end products of photosynthesis?

Answer 16

glucose and oxygen

Question 17

What does glucose get broken down into during cellular respiration?

Answer 17

energy, Carbon Dioxide, water

Question 18

Which process releases the most carbon from the lithosphere (ground) to the atmosphere?

Answer 18

Combustion (burning of fossil fuels)

Question 19

The burning of fossil fuels produces excessive amounts of carbon dioxide that is released into the atmosphere. How does this affect cellular respiration?

Answer 19

Increased carbon dioxide traps the sun’s energy contributing to climate change

Question 20

The ocean absorbs carbon dioxide that is released by the burned of fossil fuels and the actions of humans. What is the benefit of this process?

Answer 20

Producers living in the ocean are able to take in carbon dioxide and produce oxygen needed for marine animals through photosynthesis.

Question 21

A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27oC. The gas being collected is probably

Answer 21

oxygen