Answer:
This would be Metaphase. I hope this helps you! :)
Warmth and vegetation were the two big things. Since everything was ice, animals would've died of hypothermia or something, and the ice wouldn't allow any vegetation to grow. It's kind of like the dinosaurs; the plant eaters died b/c they didn't have any vegetation to eat, and the meat eaters died b/c they didn't have any meat to eat since the animals died. Same thing happened in the ice ages. Just with the added variable of freezing temperatures.
Answer:
The two main types of DNA organization present in chromosomes are the extended DNI and the condensed DNI
Explanation:
In eukaryotes, the complete chromosome is composed of only one lineal and extremely long DNA molecule. DNA is intimately associated with two types of proteins: <u><em>histones</em></u>, which are structural proteins, and <em>non-histone</em> proteins that mediate different functions of DNA.
DNA associated with histones is called <u><em>chromatin</em></u>. Histones are responsible for packaging DNA molecule, and the fundamental unit of packaging is known as a <em><u>nucleosome</u></em>. As chromatin must be condensed, nucleosomes generate regular structures between themselves forming a <em><u>chromatinic fiber</u></em>, in which DNA is very condensed. A superior level of condensation is the structural <em><u>ringlet-shaped domain</u></em>. At this level, a chromatinic fiber is folded and a protein is responsible for keeping joined the two regions of DNA that form the ringlet. The next condensation level is the rolling of the ringlet-shaped domain composing the <u><em>chromosome</em></u>. The typical chromosome in the metaphase is formed by <u><em>two chromatids</em></u> joined by a centromere. Each chromatid is composed of a sequence of chromatin ringlets domains. In the interphase, <em>before cellular division</em>, chromatin is in a diffuse, lax, uncondensed state, known as extended DNA. When <em>cellular division</em> is about to happen, chromatin begins to condensate. At the beginning of the <em>prophase</em>, DNA is condensed in a well-defined chromosome formed by two sisters chromatids.
Answer:
Cassie and her brothers, Stacey, Christopher-John, and Little Man, are walking to school on the first day of the school year, dressed in their Sunday best. T.J. joins them and tells them about how a man named Berry was nearly burned to death by white men the previous night. T.J. also tells how he avoided trouble by blaming it on his little brother, Claude. For this, the Logan children grow angry with him. A school bus filled with white children speeds by, showering the children with red dust as it passes. Jeremy, a white boy who is often beaten for walking to school with and associating with the Logans, soon joins them. But as a group of white children including his sister runs past, he has to leave them, and head towards the Jefferson Davis County School, the white school, where the Mississippi state flag, with its confederate emblem, flies above the American flag.
The Logan children soon arrive at Great Faith Elementary and Secondary School. Cassie, a fourth-grader, is not eager to please her teacher, Miss Crocker. She is assigned a seat in the first row. She and the other students are surprised to learn that this year they will have books. However, the books are very old and dirty; they are books no longer needed at the white school. This infuriates Little Man and Cassie, and they are both whipped for trying to refuse the books. After school, Cassie runs to tell the trouble to her Mama, who is a teacher in the seventh grade. But Miss Crocker is already there. Eavesdropping, Cassie hears her Mama agree with Miss Crocker that she should have punished her children for disobeying their teacher. At the same time, she takes a white paper and glues it over the inside cover of the children's books, hiding the table that showed that the books used to be used by white students and were now issued to "nigras."