I think the correct answer from the choices listed above is option A. The balanced equation representing the decomposition of lead oxide would be that <span>PbO2 = Pb + O2. It decomposes into oxygen gas and lead metal. Hope this answers the question.</span>
Answer:
<em>In a population, natural selection acts on phenotype of individuals.</em>
Explanation:
Natural selection tends to favour those organisms of a population which carry traits that allow them to be better adapted to the environment and these traits are passed on to their offsprings. Natural selection tends to act on the phenotype of the population whereas evolution is the phenomenon which changes the allele frequencies. Natural selection acts on individual organisms of a population whereas the change in populations, on the whole, arises due to evolution.
The right answer is ionic compounds.
Ionic compounds do not contain distinct molecules but interacting ions
electrostatic.
An ionic compound is formed by the association of positive and negative ions.
An ionic compound is electrically neutral.
Here's an example : Calcium chloride
Writing of the ionic compound: CaCl2
Positive ion: calcium ion Ca ++
Negative ion: chloride ion Cl-
The biogeochemical cycle can be defined as the process by which the vital elements of the living matter are circulated around. The essential elements are moved along all the components of the Earth whether it be biotic component or abiotic component. The chemical substances move through both these parts of the other during a biogeochemical cycle.
Hence, the correct answer is option (c).