At any given time, one (1) billion tons of phytoplankton can be found. Every year, around 45 billion tons of phytoplankton exist in the ocean. Beyond serving as a food source for fish, they play a vital role in the carbon cycle. This phytoplankton absorbs 45–50 billion tons of inorganic carbon into their cells, representing the principal source of atmospheric oxygen.
During step 3, chromosomes switch genetic information.
Clarification:
Meiosis is a form of cell division occurring in gamete formation. This process consists of two main stages - meiosis I and meiosis II.
Within meiosis I, events such as crossing over and independent assortment occur, leading to the exchange of genetic traits between pairs of homologous chromosomes and the division of these chromosome pairs. Therefore, the two cells generated from meiosis I will be genetically distinct. Step 3 illustrates the crossing over that happens during prophase 1 of meiosis I. Consequently, this results in genetic variation among offspring.
Answer:
DNA can be likened to a zipper. As with a zipper, the two DNA strands are connected by hydrogen bonds formed between nucleotides. When replication occurs, the twisting of the strands unravels, akin to opening a zipper. The strands separate, just as the teeth of a zipper do when it is unzipped. Each strand is capable of generating a new strand.
However, just like improper handling or wear can damage a zipper, DNA replication can also introduce errors that may result in mutations.
