When an ophthalmologist uses an ophthalmoscope to look into your eye he sees the following view of the retina
In the center of the retina is the optic nerve, a circular to oval white area measuring about 2 x 1.5 mm across. From the center of the optic nerve radiates the major blood vessels of the retina. Approximately 17 degrees (4.5-5 mm), or two and half disc diameters to the left of the disc, can be seen the slightly oval-shaped, blood vessel-free reddish spot, the fovea, which is at the center of the area known as the macula by ophthalmologists.
During chemical reactions, the bonds that hold molecules together break apart and form new bonds, rearranging atoms into different substances. Each bond requires a distinct amount of energy to either break or form; without this energy, the reaction cannot take place, and the reactants remain as they were. Simplisticly said During chemical reactions, the chemical bonds between atoms are altered.
Because there is a limited amount of genes that are responsible for height/size/weight of an animal and the presence of these genes in the genome of an animal isn't really connected to the amount of genes that are present in that genome. For that reason, a big animal can have the same amount of genes as a small animal does.
Farming and the surplus of food allowed humans to focus on activities other than food production, which led to the division of labor and the creation of new social classes-True.
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Farming refers to those activities that are associated with the cultivation of crops and growing livestock. When the crops that are cultivated exceed the nation of a particular nation, then it leads to the surplus of food. In that situation, the governments will take necessary steps for storing the cultivated crops for the future usage.
When different works are allotted or assigned to different workers for the completion of certain tasks and also for improving the efficiency refers to the division of labors. When the Framing and the surplus of food exits it makes them to concentrate on the activities other than farming and this will increase the division of labor and the creation of new social class.
<span>A diagnostic test in which contrast material is inserted into the bladder through a catheter and x-rays taken as the patient urinates is abbreviated: is called retrograde cystography.
Retrograde means backward and cystography mean to visualize urinary bladder. This examination is used to visualize bladder when there is some obstruction in the urethra. Since a catheter can't be put on through there so it's inserted to bladder directly.
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