1 2 and maybe 3 for sure 1 and 2 not 3 though
Answer:
Gravity?
Explanation:
These are the things needed for life: water, air, food, light, shelter, and space. It doesn't include gravity.
Selective breeding
hope this helps
Answer:a compound present in the body as a neurotransmitter and a precursor of other substances including epinephrine
Explanation:
Answer:
They have uncoiled to form long, thin strands.
Explanation:
Chromosomes are present in cell nucleus and consist of chromatin. Genes are present in linear order on chromosomes. The chromosomes become visible under the microscope as distinct structures during cell division. When cells are not dividing, the chromosomes decondense to loose their individuality and make the mass of chromatin.
Chromatin is complex of DNA and packing proteins. As the cells enter the prophase stage of cell division, condensation of chromatin occurs and individual chromosomes become visible under microscope. Before that (during interphase), chromosomes are not visible as they are present in decondensed form.
