Capillaries are made up of very thin and flat tissues that are spread across the body. Substances are able to diffuse through the capillaries because of the presence of blood. Particularly, the red blood cells that make-up blood within the body. These cells have the ability to carry oxygen, carbon dioxide, glucose, and water to pass through the capillaries.
Answer:
c. YACs
Explanation:
YACs, the Yeast artificial chromosomes are the high capacity vectors designed to carry the eukaryotic genes and carry the insert of 200-2000 kb.
YACs carry origin of replication from yeast, selectable markers and sequences derived from telomeres and centromere to maintain the stability of the insert during cell division.
The insert size for plasmids, bacteriophage, PACs, and cosmids is about 0.1-10 kb, 5-25 kb, 100-300 kb, 35-45 kb respectively.
Mutations are the source of all new alleles. An allele is a variant form of a gene. Variations in alleles lead to variations in organisms. Positive mutations give an organism a better chance of survival. It means that the mutation may be passed on to the offspring. Negative mutations may lead to an early death.<span> Therefore, changes in alleles from one generation to another form the basis of evolution.</span>
A pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule.
that is the definition^
