Red-cheeked salamanders are partially protected from predators because of cardiac glycosides they produce from glands on their b
ack. When ingested, cardiac glycosides disrupt normal heart rhythms. A different salamander species, the imitator salamander, also has red cheek patches, but does not produce cardiac glycosides. It does gain protection from predators that have learned to avoid red cheeked salamanders. How does this relationship affect the population dynamics of both species? Red-cheeked salamanders are partially protected from predators because of cardiac glycosides they produce from glands on their back. When ingested, cardiac glycosides disrupt normal heart rhythms. A different salamander species, the imitator salamander, also has red cheek patches, but does not produce cardiac glycosides. It does gain protection from predators that have learned to avoid red cheeked salamanders. How does this relationship affect the population dynamics of both species? The red cheeked salamander is negatively affected, the imitator is positively affected. Both species are negatively affected. The red cheeked salamander is positively affected, the imitator is negatively affected. Both species are positively affected.
spiders don't come into contact with their webs all at once. Instead, they move nimbly along the strands of their webs with only the hairs on the tips of their legs making contact with the sticky threads.
An earthworm is a tubular, segmented worm of the phylum Annelida. They occur worldwide and are commonly found in soil, eating live and dead organic matter.
