B) Microscope & hand lens.
Microscope are used to see things far away, and hand lens are used to see things up close and magnify them.
Your nerves in your feet send signals to your spinal cord and brain telling you its hot so you don't burn your flesh
Answere1SER helps in the manufacture of fat molecules or lipids
2It plays a critical role in detoxifying many poisons and drugs in the liver
Ans.
Chromatin molecules are made up of DNA and histone proteins. Modification of chromatin structure include covalent, post-translational changes in histone proteins, present in chromation. Acetylation and methylation are two important histone modifications that affect structure of chromatin molecules.
Acetylation involves addition of an acetyl group to histones that increases transcription of DNA by loosen the association between DNA and nucleosome.
Methylation involves addition of a methyl group to histones that results in condensation of chromatin molecule and thus, decreases transcription of DNA.
Both acetylation and methylation are reversible processes.
Many chromatin modifications are genetic, means they can pass from one generation to another generation, called epigenetic modifications.
Thus, options B), C), D), E), and F).
<span>The atomic number of a neutral atom is equal to
the number of protons and the number of electrons of the atom. The atomic
weight meanwhile is equal to the sum of the number of protons and number of
neutrons. We add therefore the number of protons and number of neutrons </span>
