Answer:
spiders
Explanation:
While humans and many other species have red blood, due to the iron in their hemoglobin, other animals have different colored blood. Spiders(as well as horseshoe crabs and certain other arthropods) have blue blood due to the presence of copper-based hemocyanin in their blood. Some animals, such as the sea cucumbers, even have yellow blood.
Answer: first 2 statements ie. It is essential that our diet provides these amino acids.
There are 20 essential amino acids.
Answer:
no we havent
Explanation:
The last one was 26,500 or 74,000 years ago.