Which of the following statements about human impact on trees is true? a. human activity always has a negative impact on trees. b. all human uses of trees require destruction of the trees. c. human activity has had both a positive and negative impact on trees. d. cutting down trees is the only activity that has a negative impact on trees. select the best answer from the choices provided a b c d

What is the function of the somatic nervous system? connects the brain and the spinal cord to the rest of the body carry signals to the muscles and glands includes all nerves controlling the muscular system and external sensory receptors controls internal organs like the heart and bladder

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?

What evidence could be used to convince policy makers to change a shipping lane from going through a whale breeding ground? information on the number of all whale species currently alive information on the number of all whales hit by boats in the given area information on the number of whale deaths in the world's oceans information on the number of whale offspring born every year. (a) scientists could collect and combine data on fish populations all around the world to show that their populations are declining. (b) scientists collect and combine data on fish populations all around the world to show that their populations are increasing. (c) scientists work together and use past data to show that fish populations are becoming locally extinct in some areas. (d) scientists work together and use past data to show that some fish populations are adapting to environmental changes.