This is not biology but i can probably help so get the surface area, then get the volume. and divide this is usually how ratios work, leave it a fraction, simplify if necessary
Environments are constantly changing, so the organism must adapt. Sexual reproduction ensures genetic diversity in the progeny. If one or a few of the progeny have new traits that can help it survive in its changing environment, it is more likely to reach adulthood and reproduce.
If a species becomes isolated, or reproduces asexually it will not adapt to its environment, its traits will be exact copies of its parents and the species will eventually go extinct, that particular scenario only works in areas where the environment is stable and not subject to change.
Called solar system because Sun is biggest and heaviest. Solar means sun planets revolve about (travel in circles around) the sun path a planet travels is called its orbit earth is the 3rd closest planet to the sun all the planets go around in the same direction (like clockwise or counterclockwise), in roughly the same plane, but at different speeds planets close to sun move fast, far out move slower closer a planet is to the sun, the hotter it is, more or less.
The effects of a mutation are different depending on the type of cell that is affected.
* If a mutation occurs in a somatic cell (all cells except the reproductive cells), this can trigger the development of a cancer (colorectal cancer, retinoblastoma...).
* If a germ cell (reproductive, giving gametes) is affected, the person will not be affected but his descendants will be affected. (this gives genetic, hereditary disease, like sickle cell anemia, haemophilia...).