Answer:
In the flask with algae, there would be photosynthesis in the presence of light which uses up the oxygen hence the dissolved oxygen in the flask with algae will be higher in the light but lower in the dark.
Answer:
Globally we are witnessing a decline in pollinators, such as wild bees, honeybees and hover flies, caused by the destruction and fragmentation of habitats, agricultural intensification and use of pesticides, introduction of novel diseases and competing alien species, and climate change
You can see the structures within the organelles of the cells (e.g the structure within a mitochondria) with an electron microscope as it has a much higher resolution than light microscopes.