The oxygen in the upper atmosphere combine to form ozone layer (o3) that allows to colonize surface water.
Explanation:
The fossil stomatolites are formed at about 3.0 ga laminated bacteria. they form the sediments to fall into a thin film of bacteria, these bacteria binds with the sediment and grows through it.
Cynobacteria uses water, CO2 and sunlight to create their own food and produce oxygen as a by product. The significance of stromatolites is that they are earliest fossil evidence life on earth.
They were first organism to photosynthesis and produce oxygen.
You’ll find someone, it looks like you’re still in secondary school, you have plenty of time, don’t try and rush it :)
Andy has decided to seek medical help for mood disturbances and sleep problems is
- Serotonin is the neurotransmitter that is probably a factor in the issues. This neurotransmitter affects a person's mood or feelings, and Andy has been suffering mood swings for no apparent cause. The serotonin may have contributed to Andy's agitations by causing a condition that may have been the root of them.
What is neurotransmitter?
A neuron releases a signaling chemical called a neurotransmitter across a synaptic gap to influence another cell. Any major body component or target cell that receives the signal may be another neuron, but it could also be a gland or muscle cell.
In the synaptic cleft, where they can interact with receptors on the target cell, neurotransmitters are released from synaptic vesicles. The receptor that the neurotransmitter attaches to determines how the neurotransmitter affects the target cell. Numerous neurotransmitters are produced from easy-to-find, abundant precursors such amino acids, which are frequently converted in a limited number of biosynthetic steps.
To learn more about neurotransmitter
brainly.com/question/9725469
#SPJ4
Answer:
Select all that apply. U Isolating themselves or pushing away friends. More angry or irritable than usual, Behaviors that harm friendships. Showing less interest in things they once loved, Engaging in potentially risky behaviors. U A change in behaviors that impairs their ability to function. 1. See answer.
Explanation:
