At a beautiful place at the right time
In terrestrial ecosystems, primary producers constitute the great biomass, and they are often large such as trees. However, the primary producers in marine ecosystems is a direct contrast to the primary producers in land. The dominant primary producers in the ocean are the phytoplankton which are microscopic. Land primary producers are bigger because biomass is highly conserve like in woody plants. While the marine primary producers are involved in a lot of process either by consumers or reducers. As a result, they are smaller.
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The technologies that helped increase productivity is system
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By 4 weeks, your baby will respond to your smile, perhaps with a facial expression or a movement. By 3 months, they will smile back at you. By 4 to 6 months, they will turn to you and expect you to respond when upset.
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sorry but here is not option so I try my best to give answer
