Gametes are sex cells. The reproductive system.
Abiotic features are not living. they may play a role in helping biotic creatures live, but them theirselves do not live.
B. the chromatids are pulled apart
Natural selection can cause speciation, which increases the biodiversity of an ecosystem. Several bacterial colonies are placed on a petri dish that contains agar with antibiotics. After 24 hours, ninety percent of the original bacteria die, but the remaining ten percent survive and later reproduce.