A placebo is kind of a "fake" treatment but, typically the person receiving a placebo is unaware it has no medical effect on them so they believe they are feeling better. For example, a lot of anxiety meds are placebos and people don't know so their brain tricks them into thinking they are feeling less anxious. This could be used in experiments where a group believes they are affected to see how they react
Answer:
sulfur oxide and nitrogen oxide
Explanation:
these are released from power plants along with carbon dioxide
The correct answer is that both <span>both produce carbohydrates and water. Plants to do it in a process called photosynthesis, and they produce oxygen as well and sulfur bacteria do it in a </span>process called chemo-synthesis, and they produce sulfur apart from carbohydrates and water.
Answer:
Both A and B
Explanation:
Because RNA is single stranded and the DNA has a helix shape
Answer:
Hydrogen bonds make water molecules spread out when they freeze. This makes ice less dense than water and allows ice to float. If ice did not float then oceans and lakes would freeze from the bottom up, killing marine life by trapping organisms in the ice. When ice floats, it insulates the water below, keeping it at around 4 degrees C or 40F, which does not freeze and allows fish to survive the winter.
Explanation:
