Answer:
A — is a chemical substance that organisms require to live
NUTRIENT
Explanation:
A nutrient is a chemical substance required by living organisms to live. These nutrients can either be organic or inorganic, but basically either organic or inorganic are required for existence. this esential nutients are
- lipids
- protein
- carbohydrates
- vitamins
- Minerals
- water
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution.
A. Troposphere
Is the closest around plane flying level
Fat (lipid) molecules are made up mostly of long chains of carbon atoms.
For a fat molecule to be considered saturated, the carbon chain must have only single bonds between them.
Schematically, they look like -C-C-C-C- ...
If the carbon chain contains one or more double bonds, such as -C=C-C-C, then the given lipid molecule is unsaturated.
If a lipid molecule (fatty acid) contains exactly one double bond in its chain, and the rest are single bonds, it is then called monosaturated. It is a more healthy food source than saturated fats.
Saturated fat are generally solid at room temperatures. Examples include lard, butter, mostly from animal sources. However, coconut oil (solid at room temperatures as well) is a saturated fat.
