Answer:
O silicon (Si)
Explanation:
-Valence electrons are electrons of the outermost shell which can participate in chemical bonding. ... -As in silicon, four electrons are present in the outermost shell, so silicon has Four valence electrons.
Answer:
Diffusion
Explanation:
The process by which substances move from areas of higher concentration to areas of lower concentration is called diffusion.
For example:
Substance moves across a cell membrane without using the cell's energy tends to move away from the area where it is more concentrated.
It is known as passive transport.
It is the process in which substance without using the cellular energy tend to move down the concentration gradient.
It is also known as simple diffusion.
When perfume bottle is open particles spread in air due to difference in concentration from bottle to out side environment.
While,
In case of active transport substance move against the concentration gradient i.e to wards the area of higher concentration.
This process require energy.
Answer:
с
Explanation:
all new cells come from other cells
Answer:
1.Urine culture and sensitive is used to identify the microorganism that is causing the infection, and to identify the antibiotics, sensitive to the microorganism, if the urinary tract is not treated promptly it can lead to recurrent urinary tract infection.
2. First urine sample of the morning is more concentrated form as urine is present in the bladder for almost 8 hours. It contains an increased number of protein or urinary casts. The sample is placed in the refrigerator to get refrigerated as holding it at room temperature and if infected with bacteria present in the urine it uses the glucose and alter the results.
3. diabetic ketoacidosis is one of the many complications if you are having diabetes. Another complication is diabetic nephropathy inorder to check the urine acetone as well as protein in urine we advise for urinalysis each time you visit.
Answer:
because it is the process of formation of functional haploid ova from the diploid germinal cells in the ovary
