Answer:
b. Chromatin remodeling
Explanation:
During initial stages in RBCs, the myoglobin gene expression is restricted through chromatin remodeling. <u>Chromatin remodelers which belong to CHD family are involved in chromosome condensation which mask the euchromatin portion of chromosomes containing genes for myoglobin expression with the help of histone proteins.</u> This leads to the masking of genes of myoglobin genes in RBCs and their expression does not take place.
Note: Mature red blood cells (RBCs) are dead cells and their only function is to transport the oxygen and nutrients to various body parts so they don't need to express any other gene than hemoglobin. RBCs become dead during later stages of their maturation, at that time their entire nucleus is degenerated but before doing that RBCs synthesize enough copies of hemoglobin gene product. This process is known as gene diminution.
Answer:
pyroclastic flow is a fast moving current of hot gas and volcanic matter that flows along the ground away from a volcano at high velocities.
Hotspot is volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle
caldera-a large volcanic crater, especially one formed by a major eruption leading to the collapse of the mouth of the volcano.
tephra-rock fragments and particles ejected by a volcanic eruption
epicenter-the central point of something, typically a difficult or unpleasant situation
fault-an extended break in a body of rock, marked by the relative displacement and discontinuity of strata on either side of a particular surface
surface waves- mechanical wave that propagates along the interface between differing media
body waves-A body wave is a seismic wave that moves through the interior of the earth, as opposed to surface waves that travel near the earth's surface. P and S waves are body waves.
sorry if this doesnt help
Answer:
Daisy's episodic memory is impaired, but her semantic memory is intact.
Explanation:
Episodic memory is the type of memory that holds events experienced by the person. That is, it is the memory that holds the places the person went, important dates, events that occurred and other things that the patient was present at the moment. If Daisy can't remember what she did last week, how the accident happened, or any of her childhood experiences, then her episodic memory is compromised.
Semantic memory allows humans to communicate with language. In semantic memory, the brain stores information about words, what they look and represent, and how they are used in an organized manner. Daisy is able to read, write and speak accurately and remember the names of countries, things, places and famous people, that means her semantic memory is intact.
The correct option is B.
Leather shoes are made form leather, which is a natural polymer. Leather is usually obtained by tanning the hides of animals, especially cattle. Natural polymers refer to those polymers that are obtained naturally from nature. Examples are wool, silk, leather, keratin, etc. Synthetic polymers on the other hand are man made, they are produced by combination of chemical substances in the industries. Examples are plastics, polyethylene, nylon, etc.
Because of the chlorophyll in them, more known as the little things called chloroplasts