Answer:
C. Nucleotides
Explanation:
Nucleic acids are macromolecules which are polymers of nucleotides. There are two types of nucleic acids namely: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleotides are the building blocks of nucleic acids.
A nucleotide is made up of three components:
- A phosphate group
- A five carbon sugar called pentose sugar. In RNA the sugar is ribose sugar and in DNA the sugar is deoxyribose sugar.
- Nitrogenous bases: There are four different types of bases in DNA: adenine, guanine, cytosine and thymine. In RNA thymine is replaced by uracil. Adenine and guanine are purines whereas cytosine, thymine and uracil are pyrimidines.
Nitrogenous base and sugar together are called nucleoside and when phosphate is also attached then it is called nucleotide.
I have only heard a few phrases for spine
Backbone
Vertebrae (vertebral column)
Spinal column
Answer:
Explanation:
There are many examples of fossils found on separate continents and nowhere else, suggesting the continents were once joined. If Continental Drift had not occurred, the alternative explanations would be:
The species evolved independently on separate continents – contradicting Darwin’s theory of evolution.
They swam to the other continent/s in breeding pairs to establish a second population.
Antenatal clinic is a clinic that is involved in provision of care to pregnant mothers. They are given advise on nutrition that is the food to eat and the ones they are not supposed to eat among other advises. The care is provided by doctors, midwifes and nurses. Pregnancy is divided into trimester namely first trimester ( first 3 months), second trimester (middle three months) and third trimester (last three months of pregnancy). During the third trimester many changes may be observed and the nurses may report the following findings to the provider during this trimester; they include varicose veins, Hemorrhoids and lordosis (change in the curvature of the spine) which are normal however client teaching is recommended. In addition, the findings may include leg cramps (normal) and fainting spells not normal but may be felt when the client is rising.
