Answer:
By preventing the synthesis of DNA halting cell growth.
Explanation:
Fluorouracil and methotraxate prevent the synthesis of the neucleoside Thymidine thus preventing DNA replication and elongation. Methotraxate has a structure analogous to Folic acid which is important for thymidine synthesis. Thus, it acts as a competitive inhibitor on dihdrofolate reductase an enzyme that is essential for tetrahydrofolate formation, a folic acid derivative.
Fluorouracil acts by inhibiting thymidylate synthase which catalyses an essential step in Thymidine synthesis.
The answer is B.- Upright bipedal walking posture.
Meiosis 2 or equational division
During the interphase that precedes the second division, there is no duplication of chromosomes, since each of them had already duplicated before meiosis 1.
Meiosis 2 is very similar to mitosis. During the metaphase 2, the chromosomes are located in the equatorial plate of each haploid cell. Chromatids, each with its centromere, separate and migrate to the cell poles during anaphase 2. They are non-identical following genetic recombination of meiosis 1.
At the end of the telophase of the second division of meiosis or equational division, we obtain four haploid daughter cells each having a simple set of non-duplicated chromosomes.
By seeing how much the tectonic plates move
Malignant tumors are classified according to the type of cells that give rise to them.
