Increased grazing of oxen and cattle
We will probably never know who first discovered that the ratio between a circle's circumference and diameter is constant, nor will we ever know who first tried to calculate this ratio. The people who initiated the hunt<span> for pi were the </span>Babylonians<span>and </span>Egyptians<span>, nearly 4000 years ago.</span>
When treating chlamydia both partners need to take the antibiotic at the same time. The correct option among all the options given in the question is option "D". Chlamydia is a common type of sexually transmitted disease and can be treated very easily. It often has no clear symptoms and it can be stooped from spreading by the use of condoms.
A person can get HIV from a blood transfusion. The correct option among all the options given in the question is option "A". The full form of HIV is Human Immunodeficiency Virus. It is actually a lentivirus that causes HIV.
If were talking birth defects it can be detected during pregnancy depending on which kind if defect it is. You can do many screen tests like ultrasounds or maternal blood screens for first trimester.
Answer:
The chemical basis of Chargaff"s rule is the bonding properties of the DNA bases.
Explanation:
According to the Chargaff"s rule in a DNA molecule the total number of purine bases are equal with the total number of pyrimidine bases that means
Adenine +Guanine=Thymine +Cytosine
In simple words the rule is based on the 1:1 ratio of both purine and pyrimidine bases.