Answer:
The defining feature of a eukaryotic cell is the presence of a nucleus. Most animals and plants have eukaryotic cells.
Explanation:
I believe you are right;
The Calvin Cycle occurs in the chloroplast during photosynthesis
The Krebs cycle occurs during cellular respiration in the mitochondria
Light energy is only needed for photosynthesis in the chloroplast
Hydrogen ions are present in both cycles<span />
Explanation:
This is more of an opinion based question, but I would say it's because we continue to produce massive amounts of pollution, and we have not taken much action into the problem at all. Countries that would be a leader in climate change would be much less populated, and limit their carbon emissions
Answer:
The correct answer is: A. They are proven protection against colon cancer.
Explanation:
Selenium is a mineral that can be incorporated into our bodies in small amounts when we consume certain foods, such as whole grain and dairy products. The amount of selenium in these products depends on the soil where the plants and animals were.
Selenium plays an important role as an antioxidant, which can lower the risk of developing several types of cancer. However, this doesn't mean that its consumption can prevent colon cancer, and the studies that had been done to prove its effectivity in these regards have been inconclusive.
Besides functioning as an antioxidant, selenium also is very important for the regulation of the thyroid hormones, which play an important part in metabolism.
The division of the peripheral nervous system is responsible for physiological symptoms such as increased heart rate and butterflies in the stomach is sympathetic!
Hope I helped! :)