<span>agriculture led to civilization because people no longer had to move to get food.
Before farming, people migrated with the animals and this caused a
nomadic lifestyle. In addition, farming allowed for surplus to be made,
and thus traded with other people. This allowed people to specialize in
different occupations instead of doing everything for themselves. </span>
Answer:
Animals needs oxygen's to survive and plants need carbon dioxide to survive. The ozone layer reflects harmful UV rays from the sun to protect the things living on Earth.
1) B
(I'm not so sure of this one) All of the other options have a steady impact on population regardless of the density of organisms except competition
2) D
Increased carbon dioxide levels would not hinder plant growth, and tsunamis aren't really linked to carbon dioxide levels. Increased carbon dioxide is unlikely to lower the air temperature so only D is left.
3) A
4) Three properties of water that allow it to sustain life are that it is adhesive, it is a good solvent, and cohesion. Adhesion is important in situations such as water travelling up xylem tubes in plants so that the water is not pulled down by gravity and can reach parts of the plant that need water. Cohesion allows the water being pulled up the xylem to stay together and for water molecules to be pulled when a neighbouring one is moved. Water being a good solvent allows inorganic minerals to be taken with water through vascular tissue, such as in the previous example.
It is expected that one of the offspings might be lavender as lavender is also a type of violet color, only lighter because of the white color parent. Offsprings have genes that are obtained from the mother and father gametes which hybrid sometimes to form separate genes.