They are multicellular, heterotrophic, they have no respiratory organs, and their digestion is intracellular!
The correct answer is: The synaptonemal complex.
Non-sister chromatids are chromatids from two homologous chromosomes. In prophase I of meiosis two homologous chromosomes pair and this pairing is called synapsis. This allows possible crossing over to occur. Two non-sister chromatids are connected in synapsis by a protein-RNA complex called the synaptonemal complex.
Crossing-over or the physical exchange of chromosome parts might occur and bring to genetic recombination. The sites of crossing-over between nonsister chromatids and are called chiasmata.
Answer:
Option C, Cell Y
Explanation:
Prokaryotic cells are the most primitive type of organism that do not possess a true nucleus in them. They do not even have true membrane-bound organelles.
The prokaryotes have a plasma membrane as their protective covering which helps them to survive in extreme conditions.
They also possess a rigid cell wall which also provides them protection and rigidity. Example: Archaea and bacteria.
I hope that this helped you
Answer:
Bird irruption and climatic phenomena subsequently
Explanation:
The Hawaiian islands are extremely diverse in both flora and fauna species. Today, similarly to the Galapagos Islands, there are thousands of species of Hawaiian finches, some of them eat seeds, others fruit, while other nectar, etc. Also, their beaks and colors are incredibly variable.
After years of research, scientists determined that it was one finch progenitor that arrived from Asia to the Hawaiian Islands around 6 million years ago, which gave rise to this process of speciation. This situation, as suggested by the researchers, occured due to a phenomenon known as 'irruption', characterized by the movement of hundreds to thousands of birds from one region to another located very far.
This finch is suggested to have gotten carried away in a storm, which eventually brought it to the Hawaiian Islands.
