Answer:
Control
Explanation:
Professor Eatwell is trying to study the effects of zinc supplements on young adults' susceptibility to the cold virus. In order to study the effect of zinc supplements it must be made sure that the effects observed during the study is the effect of the zinc supplement solely.
In order for this to happen a control group is used where the group is not given zinc supplements even though the group members think that they are receiving zinc supplements.
Answer:
from eating plants and eating the animals that ate the plants
Explanation:
Plants take up nitrogen compounds through their roots. Animals obtain these compounds when they eat the plants. When plants and animals die or when animals excrete wastes, the nitrogen compounds in the organic matter re-enter the soil where they are broken down by microorganisms, known as decomposers.
Answer:
Probably false
Explanation:
Engineers need extensive training
Answer:
<h3>Farming had to be done vertically or terraced.</h3>
Social comparison is particularly powerful during middle childhood because self-concept becomes more logical and specific, and less optimistic. Social comparison is determining our own personal and social worth based on how we compete against others. Because of that, we constantly make evaluations about ourselves and others.
