I believe they cannot start with big trees and bushes because the there is not enough nutrients in the soil, so instead pioneer species pave the way for primary succession.
In certain organisms, like humans, there are two morphologically distinct types of gametes: (1) the male gamete (i.e. sperm cell) and (2) the female gamete (i.e. ovum). The male gamete is smaller in size and motile whereas the female gamete is several times bigger and non-motile. The haploid condition of the two gametes is essential so that at fertilization during sexual reproduction the integrity of the chromosomal number is maintained throughout generations.
Hope this helps.
The main reason for the species extinction is for the ecological changes.
False, because most organisms decompose fairly quickly after they die. For an organism to be fossilized, the remains usually need to be covered by sediment soon after death. hope this helps :))
Since the main food source for the crocodiles from the group B is fish, overharvesting of fish will have a negative impact on Group B.
Overharvesting of fish or overfishing can usually have serious consequences on aquatic ecosystems, including organisms such as crocodile in this example. Overfishing results not only in affecting the balance of life in the oceans, but also of the coastal communities who depend on fish for their way of life.
