What is usually the 1st step in addressing environmental problems

Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?