Answer:
Both natural selection and genetic drift are mechanisms for evolution (they both change allele frequencies over time). The key distinction is that in genetic drift allele frequencies change by chance, whereas in natural selection allele frequencies change by differential reproductive success.
Mars, Mars supplies all the plants with carbon dioxide, since they have no oxygen of their own
Answer:
Symbiosis is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic.
Explanation:
I have the definition in my notes.
Answer:
soil nutrients remain in the area which enables plants to grow
Explanation:
In primary succession, a previously uninhabited or barren area such as newly exposed rock is colonized by living things for the first time. In secondary succession, an area that was once occupied by living organisms is disturbed, by an event such as a forest fire or flood, and then re-colonized following the disturbance.
Secondary succession happens more frequently and more 'easily' because once living things have been in an area, the soil is full of nutrients, making it easier for plants to occupy the space and grow more quickly. When there is no nutrients in the soil, it is much less fertile, and tricky for plants to grow.
