Which of these is a harmful interaction? a competition b mutualism c commensalism d symbiosis

What do butterflies have on their feet which allows them to sense different strengths and types of nectar? a.mechanoreceptors b.acoustic receptors c.substratum receptors d.chemoreceptors

What is the difference between electrically neutral objects and electrically charged objects

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system