Biology

What is the difference between diffusion and osmosis? Students explore the processes of diffusion and osmosis using a selectively permeable membrane. Students investigate the relationship between solute size, solute concentration and the passage of w...

What is the difference between diffusion and osmosis? Students explore the processes of diffusion and osmosis using a selectively permeable membrane. Students investigate the relationship between solute size, solute concentration and the passage of w...

What is the difference between diffusion and osmosis? Students explore the processes of diffusion and osmosis using a selectively permeable membrane. Students investigate the relationship between solute size, solute concentration and the passage of w...

Students investigate the rates of enzyme catalyzed reactions. By observing the uncatalyzed decomposition of hydrogen peroxide over time followed by the quick catalyzed reaction students truly get a sense of the importance of enzymes in life processes...

Students investigate the rates of enzyme catalyzed reactions. By observing the uncatalyzed decomposition of hydrogen peroxide over time followed by the quick catalyzed reaction students truly get a sense of the importance of enzymes in life processes...

Students investigate the rates of enzyme catalyzed reactions. By observing the uncatalyzed decomposition of hydrogen peroxide over time followed by the quick catalyzed reaction students truly get a sense of the importance of enzymes in life processes...

Students learn the necessary skills of a cellular microscopist as they fix and stain their own onion root tip slides to study the cell cycle and the phases of mitosis. Students quantify the number of cells in each phase and calculate the amount of ti...

Students learn the necessary skills of a cellular microscopist as they fix and stain their own onion root tip slides to study the cell cycle and the phases of mitosis. Students quantify the number of cells in each phase and calculate the amount of ti...

Students learn the necessary skills of a cellular microscopist as they fix and stain their own onion root tip slides to study the cell cycle and the phases of mitosis. Students quantify the number of cells in each phase and calculate the amount of ti...

Teach meiosis terminology using this simple hands-on simulation kit. Students string alleles (pony beads) onto chromosomes (chenille wires) and mark the beads to create a unique gene sequence. Then, students cross over sections of the chromosome and ...

Teach meiosis terminology using this simple hands-on simulation kit. Students string alleles (pony beads) onto chromosomes (chenille wires) and mark the beads to create a unique gene sequence. Then, students cross over sections of the chromosome and ...

First, students use thin-layer chromatography to separate the pigments in Cyanobacteria and spinach. By examining the different pigments contained in these two autotrophs, students see the similarities and differences between two diverse kingdoms. Th...

First, students use thin-layer chromatography to separate the pigments in Cyanobacteria and spinach. By examining the different pigments contained in these two autotrophs, students see the similarities and differences between two diverse kingdoms. Th...

First, students use thin-layer chromatography to separate the pigments in Cyanobacteria and spinach. By examining the different pigments contained in these two autotrophs, students see the similarities and differences between two diverse kingdoms. Th...

Students make simple respirometers to create a respiration chamber to study cellular respiration. The amount of oxygen consumed by germinating and nongerminating pea seeds is measured and compared to changes in the control (glass beads). The effect ...

Students make simple respirometers to create a respiration chamber to study cellular respiration. The amount of oxygen consumed by germinating and nongerminating pea seeds is measured and compared to changes in the control (glass beads). The effect ...

Students make simple respirometers to create a respiration chamber to study cellular respiration. The amount of oxygen consumed by germinating and nongerminating pea seeds is measured and compared to changes in the control (glass beads). The effect ...

Aluminum pans are an economical choice for large water baths, or for use as a demonstration tray. Large size is perfect for long apparatus. Pan measures 18" x 13" x 2 1/2".

What is the water quality of this stream? Is it polluted? Students use a sample of illustrated macroinvertebrates to determine the Biotic Index and the water quality of a simulated natural water source. Students also use the illustrated macroinverteb...

Transformation involves the uptake of extra-cellular DNA by another cell, resulting in a newly acquired genetic trait. In this experiment, the bacterial “transformants” acquire antibiotic resistance and a blue color, following uptake of plasmid carri...

The Lambda DNA used in this experiment is isolated as a linear molecule from the E. coli bacteriophage lambda. It comprises approximately 49,000 base pairs and has five recognition sites for Eco RI. Students will run a comparison-based electrophoresi...

Living Drosophila provide a dynamic genetic learning experience in this month-long lab activity. Students become working scientists as they culture, perform test crosses of mutant strains, and then make daily observations and compile data. They then ...

Living Drosophila provide a dynamic genetic learning experience in this month-long lab activity. Students become working scientists as they culture, perform test crosses of mutant strains, and then make daily observations and compile data. They then ...

Living Drosophila provide a dynamic genetic learning experience in this month-long lab activity. Students become working scientists as they culture, perform test crosses of mutant strains, and then make daily observations and compile data. They then ...

Ample, vigorous cultures are shipped with carefully-formulated medium in 4" x 1 1/4" shatterproof plastic vials. Vials include netting and foam plugs. Cultures must be prepared up to one week in advance of shipping date; for this reason ord...

Drosophila, Mutant Cultures   Ample, vigorous cultures are shipped with carefully-formulated medium in 4" x 1 1/4" shatterproof plastic vials. Vials include netting and foam plugs. Cultures must be prepared up to one week in advance ...

Drosophila, Mutant Cultures   Ample, vigorous cultures are shipped with carefully-formulated medium in 4" x 1 1/4" shatterproof plastic vials. Vials include netting and foam plugs. Cultures must be prepared up to one week in advance ...

Drosophila, Mutant Cultures   Ample, vigorous cultures are shipped with carefully-formulated medium in 4" x 1 1/4" shatterproof plastic vials. Vials include netting and foam plugs. Cultures must be prepared up to one week in advance ...

Is the population evolving? In the first activity, students use the Hardy-Weinberg equilibrium equation to determine the allele frequency of PTC tasters versus nontasters in the class. The second activity explores the changes of a large population to...

Students test the rate of transpiration in plants using a student constructed potometer. By inserting live bean seedlings into the potometer, students will easily observe the rate of water used by the plant's vascular system. The students will learn ...

Students test the rate of transpiration in plants using a student constructed potometer. By inserting live bean seedlings into the potometer, students will easily observe the rate of water used by the plant's vascular system. The students will learn ...

Students learn advanced microscopic preparation techniques to study plant tissues. Students prepare their own stoma impressions using clear tape and make thin-sections of stems in this hands-on microscopy laboratory. Essential skills for any advanced...

Students learn advanced microscopic preparation techniques to study plant tissues. Students prepare their own stoma impressions using clear tape and make thin-sections of stems in this hands-on microscopy laboratory. Essential skills for any advanced...

Students learn advanced microscopic preparation techniques to study plant tissues. Students prepare their own stoma impressions using clear tape and make thin-sections of stems in this hands-on microscopy laboratory. Essential skills for any advanced...

Students measure key health indicators such as heart rate and blood pressure while resting, reclining, after standing, and after exercising. The heart rate of Daphnia is used to illustrate the direct effects of temperature change on ectothermic (cold...

Students measure key health indicators such as heart rate and blood pressure while resting, reclining, after standing, and after exercising. The heart rate of Daphnia is used to illustrate the direct effects of temperature change on ectothermic (cold...

The “water-flea.” Daphnia has long been popular for simple physiology studies because its heartbeat is easily viewed under the microscope. The effect on heartbeat caused by changes in temperature and by the application of specific drugs to the cultur...

In the first two activities, students observe and study the taxis and kinesis behaviors of isopods in response to environmental factors within a choice chamber. In the third activity, students design a controlled behavioral response study using isopo...

In the first two activities, students observe and study the taxis and kinesis behaviors of isopods in response to environmental factors within a choice chamber. In the third activity, students design a controlled behavioral response study using isopo...

In the first two activities, students observe and study the taxis and kinesis behaviors of isopods in response to environmental factors within a choice chamber. In the third activity, students design a controlled behavioral response study using isopo...

Commonly known as "roly-polies" and "sow bugs" these small, harmless isopods are convenient for classroom studies. They are easy to care for and fun to observe. Isopods are great subjects for the behavior studies activities. Suppl...

The relationship between the amount of dissolved oxygen in water and water quality are explored in this classic biochemistry activity. Students learn the importance of dissolved oxygen and the health of aquatic ecosystems. In the first activity, the ...

The relationship between the amount of dissolved oxygen in water and water quality are explored in this classic biochemistry activity. Students learn the importance of dissolved oxygen and the health of aquatic ecosystems. In the first activity, the ...

The relationship between the amount of dissolved oxygen in water and water quality are explored in this classic biochemistry activity. Students learn the importance of dissolved oxygen and the health of aquatic ecosystems. In the first activity, the ...