Answer
10%
Explanation
Learned last year
If my memory recalls correctly. Its because of the nature of phospholipids and their double membrane layer. It basically "keeps" all the water from escaping, due to the double bilayer
The part of the leaf that is connected to the transport sister in the veins of the leaf.
Duplications are repeated segments of genetic materials that result from unequal crossing over during meiosis or through a replication error prior to meiosis. They usually occur when homologous pairs do not line up correctly or in chromosomes with a lot of repeat sequences. Duplication of a segment of a chromosome would result in Genetic variability during evolution due to gene duplication.