Biology 2483A Lecture : Evolution of Multicellular Animals

• School: Western University
• Department: Biology
• Course: Biology 2483A
• Professor: Hugh Henry

Document Summary

Guts used to maximize energy of absorption in us (bacteria in there) Animal cells are generally more energy-rich than plant, fungal, or bacterial cells which tend to have higher concentrations of structural components such as cell walls that are not easily digested. Insects have differences in terms of how they capture their prey. Tiger beetles use their mouthparts to capture prey and to cut and chew animal tissues. Moths have a curled stylet that is extended into flowers to suck nectar. Deerflies use piercing mouthparts to penetrate the skin of animals and extract blood. The sponging mouthparts of blowflies are used to soak up partially digested food. Golden eagle bills are hooked for tearing the flesh of their prey. Red-headed finches have short bills suitable for cracking seeds. American avocet bills are long and thin for probing mud and sand for small subsurface animals. Pied kingfishers have long, sturdy bills suitable for plucking small fish from the water.