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All diatoms are enclosed by a frustule that is made up of two valves fitted together by a connective zone called a girdle.

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Why do centric diatoms live in saltwater and pennate diatoms live in freshwater?

Centric diatoms have a spherical shape that helps them float and stay suspended in the water column, which is more common in saltwater environments with consistent water movement. Pennate diatoms have a more elongated shape that allows them to attach to surfaces in freshwater environments where there may be less water movement. This difference in shape relates to their respective preferences for saltwater and freshwater habitats.


Why is it important for diatoms to live near the surface?

Diatoms rely on sunlight for photosynthesis, so living near the surface allows them to access light for energy production. Additionally, being near the surface helps diatoms to disperse their spores more effectively, promoting reproduction and species survival.


Where does a diatom live?

Diatoms are a type of algae that can be found in various aquatic environments, including oceans, lakes, rivers, and even in damp soil. They are typically found in environments with high levels of nutrients and sunlight, as they rely on photosynthesis for energy.


What kind of house do people who live in swampy and riverine areas build?

wet lands


What ocean zone do diatoms live in?

Diatoms are primarily found in the sunlit zone of the ocean, also known as the euphotic zone. This zone receives enough sunlight for photosynthesis to occur, which is essential for diatoms as they are photosynthetic organisms. They are most abundant in surface waters where sunlight penetration is optimal.