Nutrient Cycles In Ecosystems Worksheet – Students are taught about the life cycles of different creatures. A butterfly’s lifecycle can be compared with that of a shark. They can also learn about the life cycle of an amphibian. This worksheet will help students understand how animals live. Students can complete the worksheet independently and as a class.
The life cycle of a human
The human life cycle begins at fertilization when the egg cell of a woman fuses with a sperm cell of a man. On the sixth day, the single cell divides into a series of smaller ones that burrow into the mother’s womb. These cells begin to form three layers and then bend into an embryo. In this stage, they also begin to differentiate from one another and form the fetal nervous system and circulatory system.
The human body and brain undergo a number of changes during this time. While there are some differences between humans and apes in their lives, they all follow the same basic cycle. Apes, on the other hand, have a more erect body that allows them to show off their mobile hands. A human body and brain undergo a variety of changes after conception, which are supported by the food we eat.
A human life cycle is structured around a series of developmental stages and age groups. It also includes an infancy period. The average life span of a human is about seventy to eighty years, but this can vary widely depending on the health of the individual.
Life cycle of a butterfly
The egg is the first step in the life cycle of a butterfly. The caterpillar’s needs are met by the egg. Most butterflies lay their eggs on leaves. The eggs can be small, round, oval or cylindrical. Monarch butterflies lay their eggs on the underside of plant leaves. They may be smooth or wrinkled. Within a few weeks, the eggs will hatch.
After the butterfly emerges from its pupa, it injects its blood into its wings. Within a few hours the wings will be fully developed and the butterfly can fly. After the wings are fully developed, the butterfly will begin to search for food and a partner. Once it has found a mate, it will lay eggs on a leaf.
The adult stage is the next stage. The butterfly lays eggs every year in spring, summer and fall. The female butterfly lays a large number of eggs at one time. The eggs may be small. The caterpillar, also known as the larva, develops from the egg. It eats continuously during this period and sheds its skin up to five times. It also stores food, which will be used by the adult butterfly.
Life cycle of a shark
Sharks have an extremely long life cycle. They can live for up to fifteen years. Most sharks are born in coastal areas and remain close to the area where they were born until they are fully grown. During this time, sharks grow, mature, and reproduce. Sharks have two claspers, which allow them to grab onto a female and insert sperm.
The eggs and sperm are incubated by female sharks for several months before they reach full term. The mother keeps the young sharks inside for about a year before they are born. Some species of sharks exhibit cannibalism, where the first pup is born alive and eats other eggs or pups. These ovoviviparous species have a variable gestation period, which can vary from several months to up to two years. Asexual reproduction is also possible in some species.
Sharks have excellent hearing and are able to detect incoming sound waves from their prey. Their two sets of dorsal fins are located on either side of their heads. Their lateral line system consists of thin canals filled with water and is attached to nerves that send signals to the brain.
Amphibian life cycle
Most amphibians have a complex life cycle, starting as a larva and ending as an adult. Hormones and the environment control these life cycles. The primary morphogens of amphibians are thyroid hormones and corticosteroids, which are produced by interrenal cells. They are dependent on inputs from the hypothalamus as well as the pituitary and pituitary. The hypothalamus controls the activity of the thyroid and pituitary glands.
Amphibians have unique life cycles and a unique ability to reproduce in two environments – on land and in water. A frog’s life cycle begins with sexual reproduction. This is when the male lures the egg-carrying women to mate. The females then release their eggs into the water where the males fertilize them with sperm. External fertilization is the most common method of reproduction for amphibians.
Many species of frogs lay eggs in calm water which protects them against predators. However, some species stay with the eggs to care for them. The eggs become tadpoles once they are fertilized. Within one to three weeks, the tadpoles are ready for hatching.
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