1) Ao estudar a evolução da espécie humana moderna, observamos o surgimento de várias características em espécies ancestrais que beneficiaram seu estabelecimento e sucesso no ambiente. Entre essas características, podemos citar a bipedia e o desenvolvimento de ferramentas. A primeira espécie reconhecida como capaz de fabricar artefatos de pedra é chamada de:

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.

When analyzing tree rings, what do scientists assume a thin ring indicates?

Below, the levels of organization in a multicellular organism are shown from least to most complex. which level of organization can be described as several different types of tissues working together to perform a common task?