Help me with human body system

What is the ecological role of food chains and food webs

Which of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.

Which of the following cognitive skills have not been displayed by animals? a. using tools b. forming concepts c. transmitting culture d. using syntax