Why Sex Matters : A Darwinian Look at Human Behavior

PER4MANCE Pipette - 10~100µL Adjustable Single Channel Pipette, ISO Calibrated Low Plunger-Force Ergonomic Micropipette with Autoclavable Lower and Universal Tip Cone, Ultra-Light Precise Pipettor

100 Pack 23G x 1 1/4" (30mm) Stainless Steel Lab Dispensing Accessories, Individually Packed,Multi-Purpose Measuring Tools for Industry, Science Laboratories, Refilling Inks and Crafts

4E's USA Pipette - 0.1-2.0μl Micropipette, Adjustable Volume Pipette with Autoclavable Lower Portion, Universal Tip Cone Single Channel Pipettes, Laboratory ISO 8655 Calibrated Pipettor

PER4MANCE Pipette - 2~20µL Adjustable Single Channel Pipette, ISO Calibrated Low Plunger-Force Ergonomic Micropipette with Autoclavable Lower and Universal Tip Cone, Ultra-Light Precise Pipettor

100 Pack 25G x 1" (25mm) Stainless Steel Lab Dispensing Accessories, Individually Packed,Multi-Purpose Measuring Tools for Industry, Science Laboratories, Refilling Inks and Crafts

PER4MANCE Pipette - 5~50µL Adjustable Single Channel Pipette, ISO Calibrated Low Plunger-Force Ergonomic Micropipette with Autoclavable Lower and Universal Tip Cone, Ultra-Light Precise Pipettor

100 Pack 16G x 1" (25mm) Stainless Steel Lab Dispensing Accessories, Individually Packed,Multi-Purpose Measuring Tools for Industry, Science Laboratories, Refilling Inks and Crafts

4E's USA Pipette - 20-200μl Micropipette, Adjustable Volume Pipette with Autoclavable Lower Portion, Universal Tip Cone Single Channel Pipettes, Laboratory ISO 8655 Calibrated Pipettor