Traits can means they can be seen and are capable of masking a different trait.

The passing of genetic traits from one generation to the next is due to the storage of information within an individuals DNA. In general, traits are said to be either recessive or dominant. When a trait is dominant it usually means it can be observed and is also capable of masking a different trait. 

Sunlight is brighter, since it doesn't have to go through water first.

More carbon dioxide in the atmosphere than in the ocean.

Mineral nutrients are plentiful in the soil.

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