What percent in all genes c. elegans are active all the time 10% 20% 60% 80%

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles

Analyze the reaction to determine whether the reaction is exothermic or endothermic. explain your reasoning.