21.
upwelling is a process where water moves from deeper parts of the sea to the surface.
this water contains a lot of nutrients from the remains of dead organisms.
(a)
(i)
nitrates and phosphates are two of these nutrients. they provide a source of
nitrogen and phosphorus for cells.
give a biological molecule that contains:
1. nitrogen
2. phosphorus

The correct answer would be b

True but only in the south coastal areas during september and early october.

Many archeologists and anthropologists disagree with dr. thorne's view.  thorne strongly believes that what many calls "homo erectus"  was in fact  homo sapiens,  and that they migrated out of africa almost 2 million years ago and dispersed throughout europe and asia. that's way different  from what scientists have always believed about the evolution of the species.

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what are the options