Answer:
Circulatory and excretory
Explanation:
Excretory removes waste products and toxins from the blood using the kidneys. The kidneys filter the blood and return the essential products (water, salt, sugar, etc) back to the bloodstream in normal amounts after removing the wastes. The circulatory system provides the kidneys with oxygen, allowing the organ to live and to do its job.
Answer:
Fossils found in lower rock layers are older than fossils found in upper layers.
Explanation:
because they are further away from the earth surface
I think it’s false idek it could be true I still don’t know
They unite to form a zygote then an embryo. Most produce both male and female gametes.
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