Why is the current the driving force of streams?
a) it carries aquatic life to where the nutrients are.
b) it mixes the nutrients and gases within the system.
c) it regulates the temperature of the stream.
d) it breaks down trash.

The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. the major factors that affect the health and function of the great barrier reef are climate change and pollution. which question investigates the effects of a biotic factor on the reef ecosystem?

What’s this animal (picture is tagged) and where is it most likely to live, rainforest or desert?

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?