Primary succession occurs<span> in essentially lifeless areas—regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. Secondary </span>succession occurs<span> in areas where a community that previously existed </span>
Fatty acids vary in their degree of saturation or unsaturation due to their number of :Double bonds
It surrounds the cell membrane and provides cells with structural protection and support. It also helps filter.
Soy inglés. Solo hablo un poco de español, disculpe si la traducción es mala
1) Utilice botellas de agua reutilizables
2) No pongas químicos peligrosos por el desagüe
3) Reciclar aceite de motor
4) Reciclar plasticos
5) Reducir las emisiones de automóviles
6) Iniciar una pila de compost
7) Educar a las personas
8) Camina, no conduzcas
9) Deja de fumar
10) Reducir la deforestación
Calcium can be found in eggs,milk,meat,etc
Calcium is not a rare element
Hope i helped you
