Which statement best describes how scientists formed cell theory? a. schwann observed that plants are made of cells and shared his theory at conferences. b. pasteur observed that cork was made of cells and published his findings widely. c. remak wrote cell theory after realizing that cells cannot come from non-living matter. d. multiple scientists and observations contributed to the formation of cell theory.

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

Ineed some everybody. the production of cells during mitosis into specialized function is called: recombination or differentiation

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.