An increase in the number of phytoplankton in an aquatic ecosystem is always beneficial.. True or False

The above statement is false.

Explanation:

Phytoplanktons can be described as the type of planktons which are able to carry out photosynthesis and hence make their own food. The phytoplanktons are the most important parts of marine food webs as they are the basic source of food and nutrition of the the marine ecosystem.

However, the increase in number of phytoplanktons is not always beneficial as they might result in harmful algal blooms.Harmful algal blooms can be described as a condition in which there is an increase in the number of algae in the marine ecosystem which becomes toxic for the other organisms.

answer: a. a gene that causes a specific trait.

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