Climatic variations and Human activities , i don’t know the third reason ..
Answer:
Good question. A lipid made of a phosphate group and two fatty acids; consists of a hydrophilic polar head and two non-polar hydrophobic tails; forms cell membranes. Many of this type of lipid serve as chemical messengers or as parts of the cell membrane; examples include cholesterol, testosterone, and estrogen
I think the answer would be B.
Hope it helps lol
Answer:
temperature can cause rocks to expand and contract
Answer: 1. messenger RNA (mRNA). 2. rna, gene, protein. brainliest?
Explanation:
Cellular respiration allows for animal cells to convert chemical energy from glucose into a usable form (ATP) without this process, animals would not be able to produce any energy for movement, transport, etc...