DNA is packaged to protect and manage the genetic information of the cell. What is the correct comparison between the packaging units of DNA?
A. While the nucleus contains chromatin substance in general, the nucleosome is a secondary compartment that forms prior to cell division, as a location where chromosomes will replicate and divide.
B. The histones are protective proteins in chromatids, but the nucleosomes and centromeres are part of the actively dividing chromosomes.
C. Chromosomes are the distinct folded units containing the DNA molecule, while chromatin in the nucleosome is the location of the associated proteins.
D. While chromatin is the collective term for the substance of DNA and associated proteins, chromosomes are the distinct units that are compact and visible during cell division.
E. While chromosome is the collective term for the substance of DNA and associated proteins, chromatin is the fluid and other molecules in the nucleus, that regulate cell division.
D. While chromatin is the collective term for the substance of DNA and associated proteins, chromosomes are the distinct units that are compact and visible during cell division.
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The central nervous system of a mammal includes the
a. brain. b. spinal cord. c. brain and spinal cord. d. brain, spinal cord, and every major nerve in the body.
____ produces genetically identical cells or individuals called clones
Fill in the blank with the appropriate word.
One source of fossils from early cells is stromatolites. What are stromatolites and how are they formed?
What will be an ideal response?
Refer to Figure 37-4. Which of the fruits listed is botanically classified as a berry?
a. c
b. d
c. f
d. g
e. h