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Only the top layer of a lake or river freezes, un- derneath the frozen upper layer the water remains in its liquid form and does not freeze. Also, oxygen is trapped beneath the layer of ice. As a result, fish and other aquatic animals find it possible to live comfortably in the frozen lakes and pondsOnly the top layer of a lake or river freezes, un- derneath the frozen upper layer the water remains in its liquid form and does not freeze. Also, oxygen is trapped beneath the layer of ice. As a result, fish and other aquatic animals find it possible to live comfortably in the frozen lakes and ponds
<span>Transfer of materials into a cell against a concentration gradient from low to high concentration requires active transport because you need energy for it to happen since its going againist the concentration gradient.
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11 minutes per cigarette, assuming it's a 20 pack around 220 minutes or 3 hours 40 minutes
D- Around 12 breaths per minute
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eukaryotic cells have true nucleus that's why it's more complex.Prokaryotic cells have false nucleus
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