LIFE CYCLES Life Cycle v Can you imagine

LIFE CYCLES

Life Cycle: v. Can you imagine if humans were born as full grown adults? Thankfully, we are born as infants and slowly go through stages before reaching adulthood. These stages are called a life cycle. v“A life cycle is defined as the developmental stages that occur during an organism's lifetime. A life cycle ends when an organism dies. ”

Life Cycle of Animals/Humans:

Stages: v. Birth… when born from the mother's womb or when developed inside an egg v. Growth… Before reaching the sexual maturity or adult age, animals pass through a growing stage. v. Reproduction… Animals reproduce in a sexual or asexual way. v. Death… After aging, animals end their life cycle by dying.

Reproduction: ◦ Reproduction (or procreation or breeding) is the biological process by which new individual organisms – "offspring" – are produced from their "parents".

From Seed to Seed in Plants: v Seed stage v Germination v Growth v Reproduction v Pollination v Spreading seeds

From Seed to Seed in Plants:

From Egg to Egg with chicken: ◦ Poultry Reproductive System the reproductive system of female poultry has two ovaries and two oviducts. ◦ The right ovary and oviduct do not function. Only the left ovary and oviduct produce eggs. The ova produced in the ovary develop into egg yolks.

Five Parts of Oviduct: v. Funnel - receives the yolk from the ovary. The sperm cells that the chicken receives from the male are stored here. v. Magnum - secretes the thick white of the egg. It takes approximately three hours for the thick white to be placed around the yolk in the magnum. v Isthmus - The yolk and thick white move from the magnum into the isthmus, where two shell membranes are placed around the yolk and thick white. This process takes approximately 1¼ hours. v Uterus - In the uterus, the thin white and the outer shell are added to the egg. The egg remains in the uterus about 20 hours. v Vagina - From the uterus, the egg moves into the vagina. The egg stays here only a short time after which it is laid. It takes about 25 to 27 hours for a chicken to produce one egg.

Four Factors in Incubating Egg: v Temperature should be maintained at 99 to 103°F v Humidity should be about 60 % during the first 18 days and 70 % during the last 3 days. v Oxygen - Sufficient air exchange to prevent carbon dioxide buildup. v Egg rotation - Eggs should be rotated two to five times daily for the first 18 days.

From Frog to Frog:

From Butterfly to Butterfly: ◦ Lepidoptera is the term for the scientific order that includes moths as well as butterflies.

The Egg The Larva

Pupa(chrysalis Adult Butterfly