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📚 Related Questions
If a zygote has 4 chromosomes, The somatic cells formed from it have how many chromosomes 4.
What are chromosomes?
When a cell is not dividing, chromosomes cannot be seen in the nucleus, not even under a microscope. However, during cell division, the DNA that makes up chromosomes gets more compactly packed and becomes visible under a microscope.
The majority of what scientists understand about chromosomes comes from studying them during cell division.
The centromere, a point of constriction on each chromosome, separates the chromosome into its two "arms." The "p arm" refers to the chromosome's short arm. The "q arm" refers to the long arm of the chromosome. Each chromosome has a centromere.
Therefore, If a zygote has 4 chromosomes, The somatic cells formed from it have how many chromosomes 4.
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Rocks provide pieces of evidence of the continental drift as the same type of rocks were found in different continents, as a proof that the same events happened in the past. This is valid for the older rocks more than the new ones, as the new ones dervied from different bases, provide a prrof that their position had changed,
fossils
Fossils provide pieces of evidence of the continental drift much like rocks. Same types of animals or plants were found in Congo and in Brazil, for example, providing a good proof that ones on the two continents were the same big one. This is perhaps one of the biggest proof of the continental drift.
climate
Climate provides pieces of evidence of the continental drift because it was what influenced the presences of certain types of rocks and fossils, as it was the environment around which those elements lived. The fact that was possible to find certain rocks or fossils constitutes a proof of the presence of certain climate, which is a proof that in the past the continent where ina different position.
is there a multiple choice?
Answer:
The most appropriate answer would be B) The chemical composition of the cell walls of each in the two kingdoms varies.
The cell wall of the eubacteria is mainly composed of peptidoglycan. It is a type of polymer made up of sugars and amino acids. The sugar component usually consists of alternate units of N-acetylmuramic acid (NAM) and N-acetylglucosamine (NAG). The sugar polymers are cross-linked with the help of a peptide chain.
In contrast, the cell wall of archaebacteria does not contain peptidoglycan. They contain other types of polysaccharides and proteins
Answer:
B
Explanation:
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El Nino is a climate cycle which happens in the Pacific Ocean. The cycle begins when the warmer water in the western, more tropical, part of the Pacific Ocean shifts eastward along the equator toward the coast of South American, where the water then pools near Indonesia and the Philippines.
The negative impact on the environment from a large-scale mining effort in the ocean are as follows;
Among the consequences of deep-sea mining, debris plumes could have the biggest influence. Plumes are produced when the tailings from mining ordinarily fine particles which are deposited back into the sea, generating a cloud of scraps floating in the ocean.
Initially, this can result in direct poisoning moreover, the risks are even greater when contaminants are portable in the sediment in the water.
Marine drainage can alter water pH to 17 and it is difficult to distinguish immediate influence on organisms from consequences generated by pH changes.
Differences in pH or heat can transform metal solubility, and thereby the bioavailable portion that immediately impacts people. Moreover, contamination endures over time: ninety years after a pyrite mine cessation, water pH was continued to be very low and microorganisms communities consisted essentially of acidophil bacteria.
and it disrupt fish migration and coral reefs
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