Answer:
The right answer is A. Matter is preserved throughout the combustion of wood.
Explanation:
A key principle regarding matter suggests that the mass prior to a reaction equals the mass afterward.
According to Joan's experiment, she found that the quantity of carbon atoms stays at 840 during the combustion process. The count of carbon atoms present in the wood initially matches the amount present in carbon dioxide once combustion completes. This illustrates that Joan's model endorses the conservation of matter principle during wood burning.
In metaphase, anaphase and telophase of meiosis 2 before cytokinesis the condition prevails.
Explanation:
Meiosis is the cell division process that occurs in gamete precursor cells to create gametes. It's a reduction division since the progenitor cells are diploid while the gametes are haploid.
During meiotic division, the cells first go through DNA replication that doubles the DNA content of each chromosome.
Then, via meiosis I, the cell experiences reduction division, transforming the diploid cell into a haploid cell. Thus, a cell with 10 chromosomes becomes one with 5 chromosomes. However, the DNA amount per chromosome remains doubled. This is corrected by the second meiotic division, where each chromosome splits into chromatids with a standard DNA content.
So at each stage of meiosis II,
until cytokinesis occurs, the cells should remain in a haploid state with double the DNA content. [[TAG_45]]
