A. a piece of DNA that controls a trait
Deoxyribonucleic acid (DNA) is the hereditary material that lies within the nucleus of all cells in humans and other living organisms. Most of the DNA is placed within the nucleus and is called nuclear DNA.
A chromosome is made up of two chromatids which are joined by the centromere. The chromatids separate from each other during mitosis to form two new chromosomes. The DNA making up a chromosome is dispersed as chromatin.
Under a microscope, chromatids look like little dots and chromosomes are lines.
some one celled organisms reproduces by binary fission which is a process of cell division. The answer is 4.
<span>Cho finds a dinosaur tooth while on a school field trip. She has found an original-remains fossil . </span>Original remains can be
changed, as minerals in nearby sediments
are stored into the porous areas of an
animal’s hard parts (teeth in this instance) after the soft parts have
decayed. This happens with dinosaur bones and teeth. <span>
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