Answer:
According to google its 7.2-7.5 billion. 6 billion is the approximate population of humans on Earth now
.
Yes it's a protein called Hemoglobin in the red blood cells and it carries oxygen around your body and to your lungs, so it is TRUE.
Hope this helps! God bess
-vf <span />
Give the real pills and placebo pills to both the girls and the boys.
Animal Senses. As humans, we get by with five senses: touch, taste, sight, smell, and hearing. ... This allows them to feel the movement of other animals in the water nearby. Snakes use a special apparatus called Jacobsen's organ to smell. Hope it helps:)