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Browse: Keyword: Biological Process

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Acid in water

(Complete Item Description)

Abstract:: Plants and animals that live in water create some amount of acid in the water. The carbon dioxide that plants and animals release into the water makes the water acidic and unsafe for living organisms. This is why the water of captive aquatic animals and plants must be changed often.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Plants and Forests , Water
Collection:: Video and Image Data Access

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Adult Artemia blood circulation

(Complete Item Description)

Abstract:: Artemia adult's blood circulation in the tail and appendages.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
Collection:: Video and Image Data Access

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Adult frog

(Complete Item Description)

Abstract:: The adult frog now lives on land and has nostrils and lungs to breathe air. It also has front and hind legs to hop around on. This frog can start the life cycle over again by laying eggs and reproducing.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
Collection:: Video and Image Data Access

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Algal blooms

(Complete Item Description)

Abstract:: Algae are producers. This means that they make their own energy and food and do not need to eat other organisms to gain energy and live. Algae use the sun, water, and carbon dioxide to go through photosynthesis and make their own energy to grow, bloom, and reproduce.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
Collection:: Video and Image Data Access

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Amaryllis anthers

(Complete Item Description)

Abstract:: The anther is a part of the stamen, the male part of a flower. It produces pollen so that bees and other insects can help spread pollen to other flowers.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Plants and Forests
Collection:: Video and Image Data Access

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Amphibians

(Complete Item Description)

Abstract:: Amphibians are vertebrates. Amphibians lay eggs to reproduce and undergo metamorphosis to go from offspring to adult. They are cold-blooded, meaning they rely on their surrounding environment and the sun to stay warm.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
Collection:: Video and Image Data Access

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Animal Defenses: Zebra

(Complete Item Description)

Abstract:: Zebras generally stay in herds together. Zebras standing together may tend to look like one very large animal to predators. Also, predatory attacks send the zebras running in every direction. The stripes could confuse the attacker as to which animal it is chasing after, leaving it without any food in the end.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Animals and Insects
Collection:: Video and Image Data Access

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Animal Studies: Fish

(Complete Item Description)

Abstract:: Fish are vertebrates, meaning they have a skeletal system to support their bodies. All fish live underwater. Fish have gills to help them breathe underwater and fins to help them swim. Most fish are cold-blooded, meaning their body temperature is regulated by the surrounding water temperature.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Animals and Insects
Collection:: Video and Image Data Access

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Animal Studies: Leech

(Complete Item Description)

Abstract:: One reason why leeches are considered to be annelids is because they have segmented bodies. Leeches suck blood from animals to get food. They release an anesthetic into the animal they are feeding on so that the animal doesn't realize they are feeding on them.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Animals and Insects
Collection:: Video and Image Data Access

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Animal Studies: Turtle

(Complete Item Description)

Abstract:: This turtle has a back full of green, mossy algae. When the turtle is stationary in the water, it can camouflage itself to look like a moss-covered rock.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Animals and Insects
Collection:: Video and Image Data Access

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Animal marks and trails

(Complete Item Description)

Abstract:: Items in nature, such as twigs and leaves, can show bite and chew marks where animals have been eating off of plants. Animals make trails by traveling over the same area several times to get to a destination.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Animals and Insects
Collection:: Video and Image Data Access

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Animal tracks

(Complete Item Description)

Abstract:: If an animal track is fork-shaped, it was probably made by a bird. If the track shows four or five toes and is paw-shaped, it was probably made by a mammal. There are many other tracks that different animals make.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Animals and Insects
Collection:: Video and Image Data Access

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Annelids

(Complete Item Description)

Abstract:: Annelids are segmented animals. They have soft bodies and no legs. They usually move by crawling.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Animals and Insects
Collection:: Video and Image Data Access

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Another view of Daphnia's movements

(Complete Item Description)

Abstract:: Daphnia with beating heart, moving eye and antennae - note internal moving structures.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
Collection:: Video and Image Data Access

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Anterior end of Daphnia

(Complete Item Description)

Abstract:: Anterior end of Daphnia showing beating heart - note moving eyes and other body structures.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
Collection:: Video and Image Data Access

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Applying pesticides

(Complete Item Description)

Abstract:: Fertilizer is one way to provide crops with the nutrients they need. Pesticides can also be applied to crops to keep them healthy and free of insects. However, applying too much fertilizer or pesticide protection could harm the environment and organisms.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Industrial and Agricultural Impacts , Plants and Forests
Collection:: Video and Image Data Access

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Arachnids

(Complete Item Description)

Abstract:: All arachnids have eight jointed legs. They lack antennae and wings, so they cannot fly. The body of an arachnid is divided into two parts, the cephalothorax and the abdomen. Arachnids lay eggs to reproduce.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
Collection:: Video and Image Data Access

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Arachnids: Tick

(Complete Item Description)

Abstract:: One reason why ticks are considered to be arachnids is because they do not have antennae like insects do. Ticks suck blood from animals and are sometimes difficult to remove from the host's skin.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
SubTopics:: Animals and Insects
Collection:: Video and Image Data Access

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Arm muscles

(Complete Item Description)

Abstract:: Human arm muscles are connected to the bones by things called tendons. Tendons are rope-like fibers that join muscles to bones and allow movement.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
Collection:: Video and Image Data Access

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Artemia appendages

(Complete Item Description)

Abstract:: Artemia adult appendages with gills.

Subject:: Science and Technology
Grade Level:: Primary, Secondary
Collection:: Video and Image Data Access

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