Biology 2

Question 1

What are decomposers?

Answer 1

Organisms that break down dead organic material and recycle nutrients back into the ecosystem.

Question 2

True or False: Decomposers are only bacteria.

Answer 2

False

Question 3

Fill in the blank: Decomposers include fungi, bacteria, and __________.

Answer 3

detritivores

Question 4

What role do decomposers play in the ecosystem?

Answer 4

They recycle nutrients and help in the decomposition of organic matter.

Question 5

Which of the following is NOT a type of decomposer? A) Fungi B) Earthworms C) Oak trees

Answer 5

C) Oak trees

Question 6

What is the process of decomposition?

Answer 6

The breakdown of dead organic matter into simpler organic or inorganic matter.

Question 7

True or False: Decomposition occurs faster in warm, moist environments.

Answer 7

True

Question 8

What are detritivores?

Answer 8

Organisms that feed on dead organic matter, such as earthworms and some insects.

Question 9

Which process releases carbon dioxide back into the atmosphere?

Answer 9

Decomposition

Question 10

Fill in the blank: The byproducts of decomposition enrich the __________.

Answer 10

soil

Question 11

What is the significance of decomposers in nutrient cycling?

Answer 11

They convert dead matter into nutrients that can be reused by plants.

Question 12

Name one major impact of decomposers on the ecosystem.

Answer 12

They help maintain soil health by breaking down organic material.

Question 13

True or False: Decomposers can only break down animal matter.

Answer 13

False

Question 14

What is the primary role of fungi in decomposition?

Answer 14

To break down complex organic substances and release nutrients.

Question 15

Which type of decomposition occurs in the absence of oxygen?

Answer 15

Anaerobic decomposition

Question 16

Multiple Choice: Which of the following is a benefit of decomposition? A) Increases pollution B) Recycles nutrients C) Decreases biodiversity

Answer 16

B) Recycles nutrients

Question 17

What is humus?

Answer 17

A dark organic material in soil formed from the decomposition of plant and animal matter.

Question 18

Fill in the blank: The activity of decomposers can affect the __________ of an ecosystem.

Answer 18

biodiversity

Question 19

What are the two main types of decomposers?

Answer 19

Microbial decomposers (like bacteria) and macro-decomposers (like fungi and earthworms).

Question 20

True or False: Decomposers only function in terrestrial ecosystems.

Answer 20

False

Question 21

What is the relationship between decomposers and primary producers?

Answer 21

Decomposers recycle nutrients that primary producers need to grow.

Question 22

Name one factor that influences the rate of decomposition.

Answer 22

Temperature, moisture, or the type of organic material.

Question 23

Fill in the blank: Decomposers are essential for the process of __________.

Answer 23

sustainability

Question 24

What happens to nutrients during decomposition?

Answer 24

They are mineralized and made available for uptake by plants.

Question 25

Multiple Choice: Which of the following is a consequence of reduced decomposer activity? A) Increased soil fertility B) Decreased nutrient availability C) Enhanced plant growth

Answer 25

B) Decreased nutrient availability

Question 26

What is a food chain?

Answer 26

Feeding relationship involving the transfer of energy through food from producer to consumer in a linear form

Question 27

True or False: A food chain can have multiple starting points.

Answer 27

False: A food chain typically starts with a primary producer.

Question 28

Fill in the blank: In a food chain, the primary consumers are usually __________.

Answer 28

herbivores

Question 29

What role do producers play in a food chain?

Answer 29

Producers, such as plants, convert solar energy into chemical energy through photosynthesis.

Question 30

Which of the following is NOT a type of consumer? A) Herbivore B) Carnivore C) Decomposer D) Producer

Answer 30

D) Producer

Question 31

What is a food web?

Answer 31

A food web is a complex feeding relationship among organisms in the same environment with two or more interrelated food chains.

Question 32

True or False: Food webs provide a more accurate representation of feeding relationships than food chains.

Answer 32

True

Question 33

What do decomposers do in an ecosystem?

Answer 33

Decomposers break down dead organic matter, recycling nutrients back into the soil.

Question 34

Fill in the blank: In a food chain, the organism at the top is called the __________.

Answer 34

apex predator

Question 35

What is the main difference between a food chain and a food web?

Answer 35

A food chain is a simple linear path of energy flow, while a food web consists of multiple interconnected food chains.

Question 36

Which trophic level do herbivores occupy?

Answer 36

Herbivores occupy the primary consumer level.

Question 37

True or False: Energy decreases as you move up the trophic levels in a food chain.

Answer 37

True

Question 38

What is the primary source of energy for most food chains?

Answer 38

The primary source of energy is sunlight.

Question 39

Name one example of a primary consumer.

Answer 39

Examples include rabbits, deer, and insects.

Question 40

Fill in the blank: The process of transferring energy from one trophic level to the next is called __________.

Answer 40

trophic transfer

Question 41

What happens to energy as it moves up the food chain?

Answer 41

Energy is lost at each trophic level, usually as heat.

Question 42

Which organisms are typically at the top of a food chain?

Answer 42

Apex predators, such as lions or sharks, are typically at the top.

Question 43

True or False: All organisms in a food web are directly connected to one another.

Answer 43

False: Not all organisms are directly connected; some may be linked through multiple pathways.

Question 44

What is a trophic level?

Answer 44

A trophic level is a position in a food chain or food web, defined by the number of energy transfers from the primary producers.

Question 45

Fill in the blank: Organisms that eat both producers and consumers are called __________.

Answer 45

omnivores

Question 46

What is the role of a secondary consumer?

Answer 46

A secondary consumer eats primary consumers and is typically a carnivore or omnivore.

Question 47

Name one example of a decomposer.

Answer 47

Examples include fungi and bacteria.

Question 48

True or False: Food webs can change over time due to environmental factors.

Answer 48

True

Question 49

What is the significance of keystone species in a food web?

Answer 49

Keystone species play a critical role in maintaining the structure of an ecosystem, influencing many other species.