Agene on a chromosome lies close to another gene controlling a different trait. this indicates that teh genes are_. the first gene contributes to the expression of the second gene. this indicates_.

All living organisms are composed of a. only one cell. b. at least 100 cells. c. at least three cells. d. one or more cells.

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

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.