Answer:White blood cells, also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells. Leukocytes are found throughout the body, including the blood and lymphatic system.
Explanation:
Answer:
Troposphere, stratosphere, mesosphere, thermosphere
this is the layers from space into earth
Answer:
C
Explanation:
They are 2 chemical properties creating a chemical reaction.
FALSE. Wild animals ARE CONSIDERED a natural resource.
Natural resources are resources taken from nature to satisfy our needs. These natural resources are:
1) Air
2) Water
3) Soil
4) Plants
5) Animals
6) Minerals
7) Forests
8) Natural Gas
9) Coal
10) Petroleum
This solar energy conversion process is known as photosynthesis. ... At this time, the oxygen level was approximately 10% of its present atmospheric concentration. ... The presence of ozone enabled organisms to develop and live on the land.
