Answer: O many celled organisms
Explanation:
Answer:
complement is a system of plasma protiens that can be activated directly by pathogens
A it can be lost during an organisms lifetime
i would say the best answer is d
The main reason for the difference in the mass extinction occurring today and previously is the pace of the current extinction. The extinction is taking place globally and involves hundreds of species at the same time. In less than 50 years, we have lost numerous species. In contrast to this, previously during the mass extinction, only a few species were lost, and other managed to survive. But, not the status is opposite due to the magnitude of the extinction.
