Answer: Option <em>A. Oak Tree</em>
Explanation: Oak Tree is a example of a producer.
Answer:1. I would be animal cell.
2. I would be mitochondria as a organelle.
3. My function within the cell is to produce energy.
4. About 1000–2000 of me are in a cell.
5. If I wasn’t there, there would be no energy would not be produced.
6. I resemble in digestive system because this is where most of my energy is used to break down foods and process it.
Explanation:
The correct answer is 2500 kcal/day.
During the first trimester of pregnancy, the daily energy requirements of the pregnant woman are the same as before the pregnancy. During the second and third trimester, the body's nutritional needs increase and the daily energy requirements increase by 300 calories.
Answer:
It is true that studying natural selection in the fields can be challenging. Some of the challenges which Darwin might have faced could have been:
Darwin was only studying one trait for his results. But there might have been many other factors or traits affecting natural selection.
Natural selection does not happen rapidly hence Darwin would have had to wait for many generations to observe the results.
The environment is not such an easy factor to study. It is complex. It might have happened that the environment might have changed before any changes were seen in the population of the birds.
