Answer:
The correct answer is Option A. polarity and good solvent.
Explanation:
Polarity is the property of water molecules to make poles. Poles are formed between two atoms having difference in electronegativity values. In water molecules, partial positive charge appears on hydrogen atom and partial negative charge appears on oxygen atom. Water is universal solvent which means it dissolves maximum number of solutes within itself.
Answer:
Explanation:a) low melting point
Poor conductivity
: Low solubility
Low solubility The mass is equal to the sum of the masses of all the individual atoms in the molecular structure.
b) The cross-sectional area of the fluid.
Therefore The diffusion coefficient is a physical constant dependent on molecule size and other properties of the diffusing substance as well as on temperature and pressure.
Answer:
Cloud iridescence
Sunlight travels through the cloud and is diffracted by the droplets, creating the rainbow effect. It can appear as a patch or band at the cloud's edges and changes as the cloud evolves.
Explanation:
Causes of speciation
<span>Geographic isolation
In the fruit fly example, some fruit fly larvae were washed up on an island, and speciation started because populations were prevented from interbreeding by geographic isolation. Scientists think that geographic isolation is a common way for the process of speciation to begin: rivers change course, mountains rise, continents drift, organisms migrate, and what was once a continuous population is divided into two or more smaller populations.
</span>Reduction of gene flow
<span>However, speciation might also happen in a population with no specific extrinsic barrier to gene flow. Imagine a situation in which a population extends over a broad geographic range, and mating throughout the population is not random. Individuals in the far west would have zero chance of mating with individuals in the far eastern end of the range. So we have reduced gene flow, but not total isolation. This may or may not be sufficient to cause speciation. Speciation would probably also require different selective pressures at opposite ends of the range, which would alter gene frequencies in groups at different ends of the range so much that they would not be able to mate if they were reunited.</span>