Membrane-bound organelle are not found in the cells of bacteria
<span>In the third stage of the birthing process, the placenta is delivered, and it does not remain intact. So, the answer is D. Placenta delivery takes about 5 to 30 minutes, and is the shortest stage. Along with the placenta, the empty bags of water attached to the placental membrane, are also delivered</span><span />
The pollutants in 1970 were the highest since recorded history and are declining steadily.
The speciation, or a divergence of the population into a separate species, can take two forms:
1. Allopatric- where a physical barrier separates populations (darwin’s finches).
2. Sympatric- where the population sharing the geographic location is forced by an environmental factors to diverge.
Once they have diverged, either prezygotic or postzygotic barriers can prevent interbreeding between the two species.
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