Which of the following is a producer?
a. a crow that consumes a dead animal on the side of a road
b. a fish that eats smaller fish for its food
c. a giraffe that eats the leaves of trees
d. a plant that has insect larvae feeding on its roots

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

You are observing different types of cells in your science lab. one cell has many chloroplasts. what is the most likely function of this cell? a. energy production b. photosynthesis c. reproduction d. digestion

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above