Answer:
to continually produce energy,your organs need oxygen and the oxygen is carried in your red blood cells.
Pioneer species are found in area's undergoing secondary succession. For example ecosystems being established by: reducing a fire, deforestation; which quickly colonize open spaces supported by vegetation.
Answer:
Venus should be b
good luck
Explanation
the order is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
It is A, the cell is divided into a parent cell and daughter cell (mitosis)
Background extinction refers to the normal extinction rate. These are species that go extinct simply because not all life can be sustained on Earth and some species simply cannot survive. Mass extinction is a widespread event that wipes out the majority (over 50%) of living plants and animals.
