Organs of excretion make up the excretory system, and excretory system is composed of a dorsal excretory gland and a pair of Malpighian tubules. Given these facts, what are organs of excretion among the following options: - kalenchoes - Malpighian tubes - solid, liquid, gas - ankles - rocks - tibias - the body's largest organ - Veins and arteries.
Malpighian tubes

Arubber band snapping causes the particles in the rubber band to vibrate, and rubber bands are available in the laboratory. Given these facts, something available in the where causes particles in itself to vibrate when snapping among the following options: - kinetic energy - voltage - an object - laboratory - mechanical - energy - heat energy - Energy.
laboratory

Q: Powering an electrical device with a battery requires a path for electricity to flow through a closed circuit, and electrical engineers work on power plants, computers, and other electrical devices. Given these facts, a battery-powered computer requires a what for electricity to flow among the following options: - direct energy - closed circuit - kinetic energy - broken circuit - open air - hydrogen and oxygen - heat energy - open circuit
A: closed circuit

Question: Plant reproduction requires pollination, and pollination is usually accomplished by bees. Given these facts, bees are useful for what for plants among the following options: - growth - killing - reproduction - termination - survival - growing - food and shelter - gene flow
Answer: reproduction

*Question*
Most canyons are formed by flowing rivers through erosion over long periods of time, and rivers contain 0.001 percent of the earth's water. Given these facts, what are most canyons caused by among the following options: - erosion - Physical weathering - magic - Freezing temperature - Flowing water - ice wedging - Flowing gas - flooding
**Answer**
Flowing water

(Question)
Amagnet moving in a coil of copper wire can cause an electric current, and electricity is passed through the copper to magnetize the core. Given these facts, what is used with copper to produce current among the following options: - a prism - energy - tube - two - chemicals - magnet - squeeze - coiled
(Answer)
magnet