The pollen grain is actually the male gametophyte generation of seed plants. Inside the anther, pollen mother cells divide by meiosis to form pollen grains whose nuclei contain half the number of chromosomes characteristic of the parent plant.
(hope that helped answer the question)
<span>When a gene changes within a population over time, it is referred to as evolution. This refers to a long but steady rate of mutations that occur in genes of organisms within the environment. A lot of factors affect a population's evolution (e.g. climate, reproduction, food source) and it is a determinant whether a species will survive for the next generations. </span>
Not really sure but I think is that rodents mate randomly but wait for someone else to answer cause I’m not 100% sure
Answer:
because the ecosystems are not adopted to this type of animals thus the invasive species will have the upper hand and will spread to the native animals disadvantage
