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1. Microorganisms are both beneficial and harmful. Which of these microorganisms is needed by plants?
a. lactobacilli
b. phytoplankton
c. nitrogen-fixing bacteria
d. virus​


Sagot :

Answer:

B. Phytoplankton

Explanation:

Phytoplankton is the base of several aquatic food webs. In a balanced ecosystem, they provide food for a wide range of sea creatures. Phytoplankton, also known as microalgae, are similar to terrestrial plants in that they contain chlorophyll and require sunlight in order to live and grow.