Question

Which of the following statements best describes a role of beneficial bacteria in
an ecosystem?
O
They make nitrogen available to other organisms.
O
They use many of the nutrients in the atmosphere
O
They release chemicals that are toxic to certain living things.
O
They exchange gases with their surrounding atmosphere.​

Answer 1

The answer is letter b

Answer 2

The study of an ecosystem is called ecology.

The correct answer is A.

Those bacteria which help other species to grow are called beneficial bacteria.

For example:-

• Lactic acid bacteria help to convert milk into curd.
• Bacteria help to make antibodies that kill other bacteria.
• Bacteria convert the nitrogen for the plant for absorption.

Few plants require bacteria to convert atmospheric nitrogen into nitrates for better absorption.

Hence, the correct answer is A that is They make nitrogen available to other organisms.

For more information, refer to the link:-

https://brainly.com/question/13899929