In the interphase, they are really thin, just one strand which is only a few atoms wide (very challenging for an optical microscope and not too easy for the electronic one)
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:
Decreased breathing (a) is not a symptom of ketoacidosis.
Explanation:
Ketoacidosis is a condition involving the levated production of ketones in the organism, usually as a consequence of type 1 diabetes.
The build up of ketones in the blood is mostly due to the breakdown of fatty acids by the body to acquire energy. Since ketone is an organic acid, its high levels decrease blood pH leading to several symptoms.
Frequent urination (polurya), fruity odor to breath, dehydratation and electrolyte imbalance are some of the symptoms. Decreased breathing rate is not a symptom, actually, ketoacidosis leads to rapid breathing.
Increasing the rate of breathing reduces the amount of CO₂ in the blood, which increases its pH making it less acidic.
The answer is any cell from the same organism.
The answer would be B) Nitrogen Trioxide
