The electrons in the outermost shell of the covalent compounds are shared by nearby atoms. As there are no free electrons for conducting electricity, the covalent compounds are perfect insulators at absolute zero. As the temperature increases, some electrons move from valence band to conduction band. This gives rise to conductivity. But as the numbers of charge carriers are very low, covalent compounds are poor conductors. On the other hand metals are good conductors cause of their bonding. Metallic bonding consists of a sea of electrons rather than discreet bonds. The free electrons are able to move freely. Since electricity and heat need electrons to move, the bonding promotes conductivity.
Answer:
sugar level
Explanation:
Diabetes mellitus , in simple language known as the diabetes , is a group of metabolic disorders which are due to increased level of blood sugar over a long period of time .
The symptoms are -
feeling thirsty , frequent urination and increased hunger .
<u>Untreated diabetes can lead to many problems , even can be fatal .</u>
The acute problems due to diabetes are - hyperosmolar , ketoacidosis or death .
There can be some serious problems which are life long -
like stroke , foot ulcers , damage to the eyes , cardiovascular disease .
Answer:
plz help me understand what your asking
Explanation:
I cannot found the images of the microscopy anywhere. But I can explain how you can differentiate a procaryote from a eucaryote under a microscope.
The first difference between them is the size of the cell. eucaryotes are generally much bigger than procaryotes. Procaryotes are visible only at x100 objective, but eucaryotes are visible starting from the x10 zoom.
The second difference is the presence of a nucleus in eukaryotes and the absence of it in procaryotes.
The third difference is the presence of organelles in eukaryotes and the presence of a cell wall in procaryotes (only visible at electronic microscopy).
