Answer:
<em>The correct option is B) DNA fragments are negatively charged.</em>
Explanation:
The backbone of the DNA is made up of sugar and phosphates. The phosphates present in the backbone of the DNA are the main reason for the DNA to be negatively charged. The negative charge of the DNA allows different DNA fragments to separate by gel electrophoresis depending on their charge/mass ratio. The smaller DNA fragments will move faster towards the positive end of the gel as compared to the larger fragments and hence they will separate.
Sunlight is the source of energy because producers such as grass and trees use photosynthesis to make energy from sunlight. Grass and trees are then eaten by animals like cows, chickens, and pigs. The animal takes in the energy it receives from the foliage, and humans in turn, receive energy from eating the livestock.
Answer:
D
Explanation:
As more trees(wood) are cut down the forest can replenish it self, the animals(biodiversity) numbers in the forest are decreasing because they don't have the resources they had before to survive.
Cell, organism, heart, skeletal muscle, digestive system.
the answer will be c because it cant work out the exact as their are other miner factors involved so it will be the average
