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www.reference.com/article/life-cycle-dog-a56d86383978387a

A dog's life cycle begins at puppyhood and spans an average of 12 years, although some dogs live considerably longer. The female dog generally become sexually mature by age one and can begin reproducing after that time if not spayed.

www.reference.com/science/human-life-cycle-2828d4f916244b27

The human life cycle begins at fertilization, then birth, and progresses through infancy, childhood, puberty, adulthood and aging, ending in death. Every stage is unique and encompasses changes in the human body.

www.reference.com/article/life-cycle-flower-4444d0f8d603eb7f

The six phases to a flower's life cycle are the seed, germination, growth, reproduction, pollination and seed spreading. All plants begin life as a seed but flowers are unique in their ability to attract pollinating creatures and spread their seeds.

www.reference.com/article/life-cycle-cat-b7e9f841ef0f1f5f

Kittens are heavily reliant on the mother for the first few weeks after they're born, and they cannot see or hear. They learn to walk at three weeks, and learn to respond to other cats. They have full coordination at seven weeks, and can become fully independent by 12 weeks. At 15 years of age, a ca

www.reference.com/science/life-cycle-bacteria-abdde3c8a6636153

The life cycle of bacteria consists of four main phases: the lag phase, the exponential or log phase, the stationary phase and the death phase. Factors that trigger bacteria growth heavily rely on this life cycle. Bacteria multiply through a process known as binary fission.

www.reference.com/article/life-cycle-worm-8517b100af6aed7f

A worm has a simple life cycle, as it starts inside an egg cocoon, hatches into a small worm, grows larger and becomes sexually mature, mates with another worm and creates egg cocoons. The cycle then repeats itself with the offspring.

www.reference.com/pets-animals/life-cycle-mammal-f69c465bdaf8742a

Mammal life cycles vary based on the species, but mammalian life cycles share the same fundamental infancy, adolescent and adult stages. Mammals begin as an egg cell fertilized by a sperm cell. Mammalian young are born after an incubation period in a womb.

www.reference.com/article/trade-life-cycle-5b7a2f40b6265457

The trade life cycle is the course of events that contribute to the introduction of a new product, then follow its growth in the market and its decline and departure from the market. A trade cycle comprises two main periods: a period of good trade where a product attracts high prices and low unemplo

www.reference.com/article/bug-s-life-cycle-cfd9429c6a7c5d29

True bugs belong to the order Hemiptera and undergo an incomplete metamorphosis involving three stages: egg, nymph and adult. Nymphs molt several times before becoming adults. Bugs are often confused with beetles, which belong to the order Coleoptera and undergo a complete four-stage metamorphosis o

www.reference.com/article/life-cycle-spider-622260cd2b08c165

The lifecycle of a spider begins with the laying and hatching of the eggs, moves to the development of the spiders and ends with the spider's reproduction, according to Brandeis University. Spiders are known for their web building, and each spider species uses its webs to catch prey, although many s