Plants can be broadly divided into two types of life cycles: annual and perennial. Annual plants, such as this Centaurea solstitialis, complete their life cycle within one growing season. Worldwide, about 6% of plants are annuals, but this number varies from region to region. For example, the proportion of annual plants increases in regions with warmer and drier conditions, this mainly when long dry summers occur. In fact, annual plant species have an advantage in that they can survive extreme conditions as seeds. Based on changing climate patterns, the proportion of annual plants is expected to increase in the future.
Plants can be broadly divided into two types of life cycles: annual and perennial. Annual plants, such as this Centaurea solstitialis, complete their life cycle within one growing season. Worldwide, about 6% of plants are annuals, but this number varies from region to region. For example, the proportion of annual plants increases in regions with warmer and drier conditions, this mainly when long dry summers occur. In fact, annual plant species have an advantage in that they can survive extreme conditions as seeds. Based on changing climate patterns, the proportion of annual plants is expected to increase in the future.
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