Yes, we should get involved if a species is disappearing since it would disrupt the balance of nature, which means that there could be an overpopulation of species or the disappearance of a species could result in a disappearance of another species.
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Answer:
1. Circulatory system is made up of your heart, arteries, veins and capillaries.
2. There isn't a photo attached. But Specialized cells perform specialized functions in multicellular organisms. Groups of specialized cells cooperate to form a tissue, such as a muscle. Different tissues are in turn grouped together to form larger functional units, called organs.
Explanation:
A. after having cowpox they where immune to smallpox HOPE THIS HELPS
The answer is d. you will recognize that heart tissue is tightly compacted and striated to allow the heart to beat, etc....
