Aquatic Animal Skeleton - Tails
Several aquatic animals use their tails to propel themselves through water and to support and balance them when they spend time on land.
Aquatic Animal Skeleton - Backbone
The backbone of an aquatic animal allows it to be very flexible under water. It usually extends into a tail and is classified as a gliding joint.
Aquatic Animal Appendages - Limbs
Several aquatic animals have appendages, such as limbs, that support their body while they spend time on ground. They are usually small because they spend most of their time in the water.
Apple Screen 5
Inside the skin, microbes are breaking down the flesh into nutrients and water. If you were to poke a hole in the skin, the inside would likely consist of brown and sticky liquid.
Ants and their needs
Ants live in structures called ant hills. They need shelter, food, air, and water.
Distributed Web Systems - Time and global state
This lecture forms part of the "Time and global state" topic in the Distributed Web Systems module.
Anole lizards are reptiles because they are covered in scales. These scales are used as protection for the lizard and help the lizard retain water in its body.
Animal Studies: Turtle
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.
Animal Products: Pearl necklace
Oysters are important to the environment because they help filter out some of the toxins and trash in water. When something irritates the oyster's insides, it secretes a substance to coat the irritant. A pearl is then formed. Humans wear pearls as jewelry.
Alligator weed is a non-native species of plant in the United States that can damage waterways by clogging them and reducing water flow. Also, it grows in a way that reduces light penetration into the water. Alligator weed is being reduced by a few different insects that were released as biological control agents, such as the alligator weed flea beetle.
Algal bloom in a lake in Tennessee
Large amounts of nutrients from agricultural runoff and pollution cause increased growth of algae. Algal blooms cause other organisms to die because the algae uses up all the oxygen in the water to grow. Eventually, this body of water will have no life in it.
Aerial view of a city
When a city is built, habitat and most organisms living in it are killed or forced to flee. Cities use a lot of energy and water and create a tremendous amount of waste and runoff. Development is the biggest source of pollution.
Acid in water
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.
Abundant green plants on the forest floor
Green plants make their own food by a process called photosynthesis. They also use nutrients and water from the soil to grow. Primary consumers (insects, chipmunks, mice and deer) eat green plants.
A schistosome parasite
Schistosomes are microscopic worms that live in water. They can enter humans through skin and cause severe tissue damage.
Case of Disappearing Water
Demonstrate and explain evaporation as part of the water cycle.
1.4 Changing environmental attitudes
Global warming: are we responsible? Is our environmental impact damaging the planet? This unit examines the use of ozone depleting technology, the impact of fossil fuel use and explores how the development of technology can influence the direction of a society. From the Industrial Revolution to the present day find out how we have changed the planet.
Saving the DNA and the viable cells of the world's endangered animals
The mission of the Frozen Ark Project is to collect, preserve and store tissue, gametes, viable cells and DNA from endangered animals. The project focuses on the thousands of animals that are threatened with extinction. Animal species are dying out at an unprecedented rate. The current round of extinctions is largely created by mankind, because of the increase in human populations and its effect on the planet's ecosystems. Global warming is a major contributor to this destruction. Despite t
Lecture 27 - 11/24/2010
Crops of the Future: A Problem-Based Learning Exercise for the Laboratory
In problem-based learning (PBL), complex, real-world problems motivate students to discover interconnections between important concepts and in doing so acquire essential skills. These skills include teamwork, problem solving, information retrieval and analysis, and communication. The activity presented here suggests a way to add a "hands on" component to PBL by integrating a problem with a guided inquiry exercise. Problem resolution depends on observations made in the laboratory, using probes an