The simplest organic molecules,hydrocarbons,contain only hydrogen atoms bonded to a carbon backbone
Well there is many different types of birds, water birds,
Land birds, desert birds, etc,. The water level will change the water
And land birds populaton, when water rises, less land birds,
When water goes down, more
Land birds.
Earths surface changes alot.
They evolved from cyanobacteria
There are two types of cell, prokaryotic (bacteria) and eukaryotic (animal, plant, fungi and protoctista (unicellular organisms)). Prokaryotes have no nucleolus – the DNA isin the cytoplasm, and it can from small circular strands of DNA called plasmids. Eukaryotic cells all have their DNA enclosed in a nucleus.