Which foods are lipids found in, and what is their function in the body?
a. lipids are found in sugars and starches and are the main source of energy for the body.
b. lipids are found in fats and oils and are an essential component of cell membranes.
c. lipids are found in fats and oils, and they speed up chemical reactions in the body.
d. lipids are inorganic nutrients, such as calcium, iron, potassium, and are found in meats, dairy products, and nuts

Its B, because A is supposed to be a carbohydrate and D says lipids are inorganic but they are organic. Last C, Catalyst speeds up chemical reactions not lipids. So B is the right answer they make up part of the cell and cell membrane. 

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.