The decussation of pyramids refers to crossover of major motor tracts in the medulla oblongata region of the brain.
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What is medulla oblongata?</h3>
The medulla oblongata is the bottom most part of the brain.
It serves as the point where the brain and spinal cord connect, making it a key conduit for nerve signals to and from the body.
It also helps control vital processes like your heartbeat, breathing and blood pressure.
Thus, the decussation of pyramids refers to crossover of major motor tracts in the medulla oblongata region of the brain.
Learn more about medulla oblongata here: brainly.com/question/26723889
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Answers:
- The sequence encodes a gene that is critical for life and cannot be easily mutated while retaining function.
- The sequence is contained in a retrovirus that has infected both species.
1- Explanation:
6.8 million years is a considerable period of time and if the cats were evolved in two different specie then technically they should have substantially different sequences of gene. However, there are some genes that are critical for the survival of the organisms because they encode a function which is equally important for the organisms of a certain category, even if they are different specie.
For example, the essential genes that are involved in maintenance of metabolism, initiation of replication or translation of genes. Therefore, with the period of time, the mutation of even a single nucleotide can be lethal for these genes, and if it happens organism will simply die. So, if one organisms is died that cannot take part in the process of evolution and would clearly be cut off from the process, However, those who survive can undergo some other mutations and become separate specie.
2- Explanation:
A retro virus inserts itself in to the genome of host organisms and become a part of them. It is very difficult to detect the presence of the retro virus until the organism undergoes infection due to its attack. Cats are a favorable host for retroviruses - called lentiviruses which attack the cats to cause a critical syndrome Feline Immunodeficiency Virus or FIV. Therefore, it is possible that same retrovirus having a particular sequence has attacked both cats and the sequences were taken from those cats.
Hope it help!
Answer:
Yes. That was the question he was trying to answer.
Explanation:
To conduct the experiment investigating the connection between pillows and disease-causing gems, Dr. Philip needs to ask himself whether the pillows that will be used in the research contain germs that contribute to allergies in a family. This question allows Dr. Philip to have the basis to start his research and come to a conclusion about the pillows used in the research. Furthermore, the research points directly to the main point of the story.
The conclusion that can be made given this information is that ants count their steps while walking.
And given that their legs were not either shorter or longer, that means their steps were either shorter or longer, which means that made either fewer or more steps then in the beginning. And if you take into consideration that they counted, let's say, 20 steps, and then either didn't get to their initial position or passed it, the answer is obvious.
