Answer:
Mutations leading to the better attachement of virus to the host cell would allow the virus to spread the infection and leave more progeny. The reproductive fitness of mutant viruses would allow the mutation to spread.
Explanation:
1. The organisms with same resource requirement compete with each other. Viruses are not living things but once inside the host cell, they behave like living things. Rapid multiplication of virus overpopulate the host cells.
2. Genetic variations are added to the viral progeny by random errors during replication of the viral genome. These random variations may impart beneficial trait, harmful feature or remain neutral. If a random mutation in the SARS-CoV2 virus allows it to adhere better to the cells of the respiratory system, the virus would be better able to infect these cells to spread the infection. Once inside the host cells, the mutant virus would leave more progeny. On the other hand, the wild type virus that lack this mutation would have lesser chances of entering the host cells and may or may not replicate.
3. The progeny of the mutant virus would compete better with the non mutant ones due to the presence of same mutation.
4. Differential reproduction and more progeny of the mutant virus would spread the mutation among the virus.
Answer:
The circulatory system interacts with every organ and system in the body hence, it is vital for every organ and system to function properly.
The circulatory system carries oxygen to the lungs and takes the waste materials out of it. Hence, a malfunction in the circulatory system can cause the respiratory system to not work properly. Severe damages will be caused to the body if oxygen is not taken to and from the lungs.
The circulatory system is also involved in carrying waste materials to the kidneys. It helps carry the waste materials out of our bodies. Malfunctioning of the circulatory system can cause no excretion of wastes from the body which will eventually lead to the death of the organism.
Answer:
plastic consumption is like using a lot of plastic and plastic waste is when you throw out a lot.
Explanation:
consumption means like eating /using
waste means throwing out / not really using
hope this helped. btw I'm not sure if this is right but I hope it is!
Development.
Nitrogen and Phosphorus are essential to the survival of an ecosystem.