Ayellow tulip and a red tulip are 1. different species 2. different breeds of the same genus 3. organisms in two different kingdoms 4. variations of the same species

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

Grasses--> mice--> cats--> coyotes suppose 10,000 units of energy are available at the level of the grasses. what is the total number of energy units lost by the time energy reaches the coyote?

What is a dendrite and what does it do?