Dna exists in chromatin form in the nucleus: letter a in the illustration. during mitosis and meiosis, chromatin undergoes a change. what is that change?

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits

What is any method of measuring the age of an object or event in years, such as using atomic half-life?

The earths core is made up mainly of what 2 substances? 2. like an egg, earth has a core, a layer surrounding the core, and a thin, hard outer layer. which layers of the earth match the layers of an egg?