Answer:
Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by: mutation
Explanation:
Gregor Mendel, the father of genetics, made his great discoveries by simplifying problems. Instead of studying complicated characters with which he might ask what is “more or less” inherited, he chose to study simple characters with which he could see whether it was inherited or not because there were only two clear, and distinct possibilities.
Answer:
cells have many structures inside of them called organelles.
Answer:
Packaged foods ( e.g. muffins, cookies or candies ) are not considered as a potentially hazardous food .
Explanation:
A potentially hazardous food is that food ( natural or man made ) which supports the rapid and progressive growth of infectious and toxin - producing microorganism. These foods are typically foods having high protein content or carbohydrate content , have high moisture content or low acidity . Examples of potentially hazardous food includes meats, eggs , cooked beans or peas ,cut fruits and vegetables , cooked vegetables, cooked rice , raw seeds and sprouts , etc. So , packaged foods are not considered as hazardous as they are packaged and so are protected from microbes as they are not in contact of atmosphere . All the other foodstuff , even boiled food is also hazardous as they provide necessary conditions required by microbes to grow like moisture, etc.
It is bad to litter because that is harming the environment. When you throw out a can, it can harm a animal or several animals. Litter can also sink into the ground (I think) and harm the plants growing.