3) Para ocorrer a manutenção da vida, é preciso haver um fluxo de energia. O fluxo de calor pode ser espontâneo ou não; e existem sistemas físicos abertos, fechados e isolados. Faça uma breve pesquisa e cite exemplos de cada sistema abaixo: - Aberto: - Fechado: - Isolado:

Which of the following was a characteristic of a dromaeosaur? modified front claw grasping with their forelimbs both a and b none of the above

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed

What is the purpose of presenting a false dilemma in a speech?