Malignant tumors are classified according to the type of cells that give rise to them.
Answer:
the 2nd and 1st statement is correct about frequencies in a population
Answer:
individual organisms of the same species living in the same geographic location at the same time makes up a population.
Explanation:
The oxygen cycle can be found in all but the geosphere. There's oxygen in the atmosphere, so it has to be there, and the biosphere includes living things, which breathe oxygen, and water (hydrosphere) is made up of partly hydrogen, so there has to be oxygen there as well.
