Define fitness of an individual organism

What did hunter gathers do to alter the environment?

What is the role of dna ligase in the elongation of the lagging strand during dna replication?

You and a group of friends are spending your vacation hiking through the mountains. it is cold in the mountains. you will be expending a lot of energy while hiking and you will need plenty of energy to keep you warm. you should pack foods high in to provide the most energy or kilocalories per gram of food. a) carbohydrates b) lipids (fats) c) proteins d) sugars