The relative dating of layers of rocks is aided by more then a principle of stratigraphy. Nevertheless, there is one that may be considered the main basic principle utilised to aid on this task - the <span>Law of Superposition</span>, which indicates that, when in undisturbed strata, the oldest rock layer lays at the bottom, whereas the youngest rock layer lays at the top. All other layers that may exist in between follow this same pattern of old to young from bottom to top.
Given what we know, we can confirm that the statement being made is in fact true, Fossils can include traces and imprints of plants and animals as well as their remains.
<h3>Why is this statement about fossils true?</h3>
Fossils are the preserved remains of ancient biological creatures. These fossils are not specific to one type of organism. Instead, fossils often contain many organisms at once. Plants, animals, fungi, bacteria, and single-celled living things are all examples of what we may find within fossils.
Therefore, we can confirm that the statement being made is in fact true, Fossils can include traces and imprints of plants and animals as well as their remains.
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Decomposers because they decompose dead organisms, which releases the carbon.
The arrows represent how much carbon moves from one reservoir to another each year, in gigatonnes per year. A) Look at the arrows pointing toward atmospheric CO2. What are the two major sources of atmospheric carbon? Ans: Natural & human activities.
Answer:
H. prophase I → genetic recombination events take place
C. metaphase I → aligning of bivalents in the center of a spindle
B. anaphase I → separation of homologous chromosomes
F. telophase I → one haploid set of replicated chromosomes at each spindle pole
D. prophase II → shortest stage
G. metaphase II → aligning of monovalents in the center of a spindle
E. anaphase II → separation of sister chromatids
A. telophase II → one haploid set of unreplicated chromosomes at each spindle pole
Explanation:
Through the process of Meiosis, a diploid germ cell (2n) divides and originates four daughter cells with a haploid chromosome number (n). Each daughter cell has half of the chromosomes of the original one. Meiosis is completed in two phases. During the first phase, and after replication, occurs the chromosome´s reduction division. During the second phase, the cell suffers a new, not reductive division.
1. In the first phase, Meiosis I:
- Prophase I: Chromosomes condensate and became visible. Occurs crossing-over between homologous chromosomes. Crossin-over makes the daughter cells to be genetically different from the original one.
- Metaphase I: The pairs of homologous chromosomes randomly align in the equatorial plane.
- Anaphase I: occurs the independent separation of homologous chromosomes that migrate to opposite poles of the cell. This separation generates different chromosomal combinations in the daughter cells.
- Telophase I: Each of the homologous pairs chromosomes is already in the corresponding poles, and the nuclear membrane forms again in each pole.
2. In the second phase, Meiosis II:
- Prophase II: Chromosomes condensate again and become visible.
- Metaphase II: Chromosomes join the spindle apparatus and migrate to the equatorial plane, where they randomly line up. Sister chromatids are holden together until they reach the Anaphase.
- Anaphase II: Centromeres divide, chromatids get separated, and each of them goes forward an opposite cellular pole.
- Telophase II: Once in the poles, the chromosomes became lax again, and cytokinesis occurs.