Prions A prion is a type of protein that can infect both people and animals by causing the brain's typically healthy proteins to fold improperly. Since prion are only proteins without any genetic material, their manner of action is very different from those of bacteria and viruses.
A prion is a type of protein that can infect both people and animals by causing the brain's typically healthy proteins to fold improperly.
Since prion are only proteins without any genetic material, their manner of action is very different from those of bacteria and viruses. Correctly folded proteins are changed into the disease-associated form once a misfolded prion enters a healthy person, possibly through the consumption of infected food. Nobody is exactly sure how this occurs as of yet.
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Nitrogenous waste of the body are excreted by organisms of different species differently. Others, such as the mammals excrete it in a form of urea while other in a form of ammonia. Still others, excretes it in a form of uric acid. The latter group of organisms being referred to are the BIRDS and REPTILES.
This organisms found to excrete the nitrogen as urea are called as uricothelic organisms and excrete white powder or paste. The process of conversion of ammonia to uric acid needs a lot of energy or energy intensive, however; it is less toxic and reduces need for water.
Black hair because a phenotype is physical characteristics of an organism.
Answer:
Homologous features
Explanation:
If two or more species share a unique physical feature, such as a complex bone structure or a body plan, they may all have inherited this feature from a common ancestor. Physical features shared due to evolutionary history (a common ancestor) are said to be homologous.
A body of rock would most likely exhibit brittle behavior under the condition of LOW TEMPERATURE.
At low temperature, the water in the crevices of the rock will freeze up, the freezing up of this water causes fractures in the rocks and as time goes on the rocks become brittle and parts of it will start falling away.<span />
