How does a chemical equation with coefficients relate to the law of conservation of mass? A. The total mass must remain constant in a chemical reaction with coefficients in order for a physical change to occur
B. The number of atoms of each element must remain the same before and after a reaction in order for mass of the products to be the same as the mass of the reactants
C. The total mass of the reactants cannot equal the total mass of the products
D. The number of atoms in each element must change after the reaction in order for the mass to remain constant
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Charles darwin published his theory of evolution in 1859. in what way foes modern evolutionary theory differ from the theory as proposed by darwin? a) darwin inferred that individuals can evolve, but modern generic science has shown that this is not true. b)darwin inferred that individuals do not evolve, but modern genetic science has shown that this is not true. c)modern science has disproved most of darwin's original theory of evolution, because darwin knew nothing about generations and their role in heredity. d)generic studies have shown that gene expression and other factors operate along with natural selection, but most of darwin's theory has been supported by modern science.

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z