Jaguars are a keystone species in the Amazon. Describe how they can be so essential to the ecosystem despite being significantly less abundant than many other species.

jaguars are keystone species because they feed herbivorous species that might decimate the plants of the ecosystem

Explanation:

Keynote species are species that help to maintain the homeostasis of the ecosystem so if they lack then the ecosystem would change drastically. Moreover, a top predator is a predator that occupies the highest trophic level in the food chain. Jaguars are both keystone species and top predators that feed herbivorous species, maintaining the health of the food chain by eliminating the excess of primary consumers that otherwise would feed too many plants (i.e., primary producers) which produce and store energy at the bottom of the food chain.

we would need to see the picture to answer it

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d