Nos níveis mais argilosos da unidade M1 I (Argilas e Calcários dos Prazeres) existem, frequentemente, cristais de gesso. Relacione a formação destes cristais com a ocorrência cíclica de transgressões e regressões num ambiente quente e húmido.

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit

What is any method of measuring the age of an object or event in years, such as using atomic half-life?

Some substances but not other can cross the (blank) membrane of a cell