3- Considera os seguintes isótopos radioativos e os respetivos tempos de semivida: Isótopo pai Isótopo filho Semivida (anos)
40K 40Ar 1,4x109
235U 207Pb 0,7x109

3.1.1- Foi feita a análise da desintegração de átomos de 40K contidos em minerais de uma amostra de rocha, tendo-se verificado que a desintegração se iniciou há 2,8x109 anos. Indica, justificando com todos os cálculos, a percentagem de átomos de 40Ar existentes nessa amostra de rocha.

If the frequency of the p allele is .63 in the population then what is the frequency of the q allele?

Benito is doing research on the effects of florida's elevation on its climate. his notes include the following: 1. the average elevation of florida is 30 m above sea level. 2. the highest point in florida is britton hill, which is 105 m above sea level. 3. the change in temperature from 0 m to 1,000 m is 7 °c. what can benito conclude about the effects of florida's elevation on its climate? a.) florida typically experiences cold temperatures and temperature changes within a narrow range. b.) florida typically experiences cold temperatures and temperature changes within a broad range. c.) florida typically experiences warm temperatures and temperature changes within a narrow range. d.) florida typically experiences warm temperatures and temperature changes within a broad range.

The first generation of offspring from the cross of two parents is called the a.f1 generation b.f2 generation c.short generation d.p generation