HELP PLEASE ITS MULTIPLE CHOICE Why is the total mass of the atoms before and after a reaction the same?

A) because The equation is unbalanced

B) Because your reaction can happen in both directions

C) some of the Atoms have become different kind of atoms.

D) all the atoms are still there, just connected in different ways

The variables for this experiment include the number of each type of sprout, the average height of those sprouts, and the amount of compost given to each plot of land.use the drop-down menus to complete the sentences and identify the independent and dependent variables. the independent variable, the one that you intentionally manipulate, is the the dependent variables, the ones that you measure the response in, are

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

Describe how alleles and genes are related