Explanation:
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
Answer:
the sperm fertilizing the egg
Explanation:
Answer:
animals will use sound, colors, and stance. Another way would be by leaving their imprint or mark on their territory. For example a dog peeing on an area they used.
Explanation:
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It's B
Explanation:
Because the fossil record shows how organisms have evoluate from relatively simple organisms to more complex organisms
Eukartyotic cells are found as bacteria or archaea. They are usually unicellular organisms. Has no nucleus. Has a very small cell size.
Prokaryotic cells are found in plants and animals. They are multicellular. Has a nucleus. And has a much bigger cell size.
They can have many of the same organelles, but prokaryotic cells are usually more advanced. They are both forms of life. They are both cells.
