What is the relationship between water clarity and kelp productivity?

Water clarity affects the depth to which sufficient light can be transmitted. In ideal conditions, giant kelp (Macrocystis spp.) can grow as much as 30–60 cm vertically per day. Some species, such as Nereocystis, are annuals, while others such as Eisenia are perennials, living for more than 20 years.

of those who start drinking before they're 15 will develop alcohol dependence

47

explanation:

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