Animal and Animal Life Cycles

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ANIMALS AND ANIMAL LIFE CYCLES

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What do we already know about animals and their life cycles?

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What do we want to know about plants and their life cycles? We want to know… How animals are classified How animals change over time

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HOW DO WE CLASSIFY ANIMALS?

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Animals are classified into two main groups: Vertebrates and invertebrates

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An animal that does not have a backbone Invertebrates

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An animal that has a backbone Invertebrates

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Types of Vertebrates Fish Amphibians Mammals Reptiles Birds

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Types of Vertebrates Mammals live on land and in water They have hair or fur Mothers nurse young with milk Almost all give birth to live young; a few lay eggs MAMMALS

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Mammals

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Types of Vertebrates Reptiles live on land and in water Have scales Breathe air with lungs Lay eggs with leathery shells or give birth to live young

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Types of Vertebrates Live on land; some spend time in water Have feathers Breathe with lungs Lay eggs with large shells Most can fly birds

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Types of Vertebrates Young live in water, adults live on land Have smooth, moist skin Young breath with gills in water; adults breathe with lungs and through skin as adults Lay jelly-like eggs with no shells Amphibians

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Types of Vertebrates Live in water Most have scales Breathe oxygen in water with gills Lay eggs without shells or give birth to live young Fish

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Most vertebrates have special organs in their body them help them to live.

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ORGANS OF THE BODY Like plants, animals and humans have various body parts and organs (such as the heart, lungs and kidneys) that help them function in life.

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The Heart The heart is an organ that helps to pump blood around the body

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The Lungs The lungs are organs that help to take in oxygen from the air when we breathe and also help release waste gases into the air

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THE BRAIN The brain controls all of the body’s activities

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The Kidneys The kidneys help to get rid of waste materials from the body

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Animals can sometimes be classified by their cyclical characteristics. Animals can be: Nocturnal Diurnal Hibernation Cyclical characteristics

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Cyclical characteristics Nocturnal animals are animals that are active at night Nocturnal

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Cyclical characteristics Nocturnal Opossum Koala Wombat Opossum Spider

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Cyclical characteristics Diurnal animals are animals that are active during the day and inactive at night Diurnal

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Cyclical characteristics Diurnal Panther Giraffe Lion Buffalo Squirrel Tiger

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Cyclical characteristics Hibernation is a deep sleeplike state when an animal’s body processes slow down to survive during winter Hibernation

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Cyclical characteristics Hibernation Bear Marmot Hedgehog Chipmunk

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ANIMAL LIFE CYCLES

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Some animals including humans , spiders and earthworms look like their parents when they are born. They grow larger in size during their lives, but they do not change their form . They go through direct development Direct Development

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Direct Development

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Other animals such as grasshoppers and beetles , look nothing like their parents when they are born. These animals change their form during their life cycles. The process of changing form is called metamorphosis. Metamorphosis

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Metamorphosis is a complete change in body structure throughout the growth stage Metamorphosis The way an organism changes as it develops in its lifetime Metamorphosis can be described as: Complete Incomplete

Video: Life Cycles:

Video: Life Cycles

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Incomplete Metamorphosis Incomplete metamorphosis has 3 stages: egg, nymph and adult . The organism never goes into a period of rest

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Incomplete Metamorphosis

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Incomplete Metamorphosis Egg - A female insect lays eggs. Nymph - The eggs hatch into nymphs. Nymphs looks like small adults, but usually don't have wings. Insect nymphs eat the same food that the adult insect eats. Adult - The insects stop molting when they reach their adult size. By this time, they have also grown wings.

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Incomplete Metamorphosis Grasshopper

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Grasshopper Incomplete Metamorphosis COCKROACH

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DRAGONFLY Incomplete Metamorphosis

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CHICKEN Incomplete Metamorphosis chick egg

Video: incomplete metamorphosis:

Video: incomplete metamorphosis

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Complete Metamorphosis An animal undergoes complete metamorphosis if it changes through four distinct stages : Egg, larva, pupa and adult.

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Complete Metamorphosis Egg - A female insect lays eggs on plant leaves or stems. Larva –The egg hatches into a larva, which looks like a worm. A butterfly lava is known as a caterpillar Pupa -The larva feeds and then makes a hard case around itself and becomes a pupa Adult - The case breaks open after a few days and the adult emerges from the pupa

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Complete Metamorphosis Butterfly

Metamorphosis of a Butterfly:

Metamorphosis of a Butterfly Learning the life cycle of a butterfly

Stage One: Egg:

The female lays eggs on a leaf. Each egg grows until it is ready to hatch. Stage One: Egg

Stage Two: Larva:

After about one week, a caterpillar hatches from its egg. The caterpillar eats, grows, and molts during this period. The caterpillar stores food energy for the next stage in its life cycle. Stage Two: Larva

Stage Three: Pupa/Chrysalis:

The caterpillar stops eating. It forms a hard case around itself called a pupa . Inside, the caterpillar goes through many changes. Stage Three: Pupa/Chrysalis

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Pupa

Stage Four: Adult:

After about a week, the adult butterfly comes out. Its body is now completely different. A female butterfly will lay eggs to start a new life cycle. . Stage Four: Adult

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Complete Metamorphosis Beetle

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Complete Metamorphosis Beetle

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Complete Metamorphosis Fly

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Complete Metamorphosis Mosquito

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Complete Metamorphosis Frog

Video: Complete metamorphosis:

Video: Complete metamorphosis

Complete vs. Incomplete Metamorphosis:

Complete vs. Incomplete Metamorphosis Complete Body structure of the insect or animal changes during the growth stage. There are four stages in this life cycle. Egg → Larva → Pupa → Adult Incomplete Body structure of the insect or animal does not change. The second stage of its life cycle looks like the adult . Thus, the nymph looks like a small adult. In addition, there are three stages in this life cycle. Egg → Nymph → Adult

The pictures show the stages in the life cycle of a beetle. What would be the correct sequence for the development of the beetle? A Q, S, R, T B R, T, Q, S C S, R, Q, T D T, S, R, Q:

QUICK QUESTION The pictures show the stages in the life cycle of a beetle. What would be the correct sequence for the development of the beetle? A Q, S, R, T B R, T, Q, S C S, R, Q, T D T, S, R, Q

The pictures show the stages in the life cycle of a beetle. What would be the correct sequence for the development of the beetle? :

The pictures show the stages in the life cycle of a beetle. What would be the correct sequence for the development of the beetle? ANSWER B R, T, Q, S