Consider the reaction for the combustion of hydrogen below: 2H2 + O2 --> 2H2O

Where would you need to add "energy" to make this reaction complete?

A. in the reactants because the reaction is exothermic
B. in the products because the reaction is exothermic
C. in the products because the reaction is endothermic
D. in the reactants because the reaction is endothermic

List two modern organisms that have pentameral symmetry

In 2015, about ten percent of total u.s. energy consumption was from renewable energy sources. renewable energy plays an important role in reducing greenhouse gas emissions. when renewable energy sources are used, the demand for fossil fuels is reduced. sanjay and his family want to cut back on their use of non-renewable resources at home. they are thinking of an alternate way to heat their home without adding more greenhouse gases or pollutants to the environment. which renewable resource would not fit into their plan? a) solar power b) burning wood c) constructing a wind turbine eliminate d) generating hydroelectric power

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.