Answer:
Explanation:
Ecological pyramids show or explain the number of organisms, the mass of each organism at each levels and the energy transfer at each trophic level. These are referred to as pyramid of number, pyramid of biomass and pyramid of energy.
In Oak tree, at the producer level, which is a tree, will be much smaller to that of primary consumer levels which comprises of millions of insects. This is different to normal trend of ecological pyramids, whereby the number of the producers is always the highest. That's the number of organisms decreases from the producers to the tertiary consumers.
In sexual reproduction offspring is safe in the womb of mother,but in asexual they are vulnerable to predators
Invasive species can either replace an organism from the ecosystem food web or replace it.
Explanation:
- Invasive species are non-native species which can be animals, plants, micro-organisms, fish, etc. they are very much threatening to the native species and ecosystem food web.
- Invasive species are spread by humans mostly, it happens unintentionally when people travel and all. Even climate change could be a reason for its spread.
- So, it becomes threatening to native species because when you introduce it into a new ecosystem, it does not have a predator or control. It grows aggressively and takes over the resources for the native species.
