Answer:Option d
Explanation:
The virus cannot live in the environment without the host cell. They need the host cell for their survival.The virus incorporates its genetic material in the genetic material of the host cell to live. They opt for lytic cycle or lysogenic cycle.
Due to environmental stressors such as the starvation or exposure to chemicals may cause the virus to switch from the lysogenic cycle to lytic cycle.
c. more offspring that can survive and reproduce.
B. Abiotic factors
C. Symbiotic relationships
D.Carnivore-herbivore relationships
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Answer:
Option 3: the cells express different genes.
Explanation:
While all cells contain the same genes (the DNA does not change based on cell function), cells can choose to express different genes during the differentiation process so they become specialized for different functions.
In this case, skin cells may begin to develop with high concentrations of strengthening proteins such as keratin and collagen, in order to carry out their main functions e.g. to act as a strong barrier against parasites, bacteria, etc.
Whereas muscle cells may have less of these proteins because their function is different, and instead may focus on developing more mitochondria to provide energy to carry out their main jobs (movement).