A vertebrate is an animal with either a spinal column or a backbone.
Domain Eukarya includes three multicellular kingdoms o Plants , which produce their own food by photosynthesis o Fungi , which absorb nutrients from their surroundings and often decompose dead organisms and organic wastes o Animals <span>, which ingest their food.</span>
Answer:
1. They must be removed before sister chromatids or homologous chromosomes can separate
Explanation:
During the S-phase of the cell cycle, not only does DNA have to be replicated, but also newly synthesized DNA molecules have to be connected with each other. This replicated DNA (sister chromatids) remain physically connected with each other from S phase until metaphase. This physical connection is called Sister chromatids cohesion.
Sister chromatid cohesion depends on COHESIN, a tripartite protein complex that forms a ring structure to hold sister chromatids together during mitosis and meiosis. Cohesin regulates the separation of sister chromatids during cell division, either mitosis or meiosis. This sister chromatid cohesion is essential for the biorientation of chromosomes on the mitotic or meiotic metaphase spindle, and is thus an essential prerequisite for chromosome segregation. Without the cohesion, sister chromatids would not be segregated symmetrically between the forming daughter cells, resulting in aneuploidy.
Cohesion is established during S-phase of DNA replication, and the cohesins hold the sister chromatid together after DNA replication until anaphase when the removal of cohesin leads to separation of sister chromatids (meiosis II and mitosis) and homologous chromosomes (meiosis I).
<span>63x
The amount of magnification you see through a microscope is extremely easy to calculate. You just multiply the power of each lens the image travels through together. So you have the equation
630 = 10 * x
where 630 is the total magnification and 10 is the magnification of the ocular lens. Now just solve for x by dividing both sides by 10
63 = x
So the objective lens has to have a power of 63x for your total magnification to be 630x</span>
It is called Analogy. Practically equivalent to structures are those structures in various species which play out a similar capacity, have comparable appearance and structure yet are not developed together; along these lines don't share a typical precursor.
Cases of practically equivalent to structures run from wings in flying creatures like bats, feathered creatures, and creepy crawlies, to balances in creatures like penguins and fish. Plants and different living beings can likewise exhibit similar to structures, for example, sweet potatoes and potatoes, which have a similar capacity of sustenance stockpiling
