1: microevolution
2:macro evolution
The undulations on the cerebral cortex (the outer layer of the brain) are called gyri (ridges) and sulci (gorges). Also called the grey matter, the cerebral cortex is the core of brain functioning region with approximately 20 billion neurons.
It is believed that the cerebral cortex is highly folded to accommodate many neurons.
Answer:
relative humidity
Explanation:
In general, a psychrometer is an instrument composed of two thermometers, used to measure the relative humidity of the air with high precision. As seen in the question above, the two thermometers allow a simultaneous measurement of the temperatures of the wet bulb and the dry bulb. Meteorologists usually use a more efficient form of the psychrometer to measure relative humidity, which is the sling psychrometer.
The lipids form an insoluble barrier.
Phospholipids, a type of lipids, don’t dissolve in water. Membrane-forming lipids have like other lipids hydrophobic region, but also in addition, they have hydrophilic region. In the cell membrane, they are organized in a lipid bilayer. In each layer, hydrophilic heads face a solution, and hydrophobic tails are inside the layer. That way, phospholipids are in contact with water, but still present a barrier because of their hydrophobic tails inside the layer.
