Answer: A
Explanation: It makes the most sense because it isn't directly speaking about something, it is mainly summarizing the main idea. I'm not 100%, but that's the one I would choose if it were me. Hope I helped out a little!
A. Fine Focus.
B. Nucleus, Cytoplasm, and membrane
C. 30 Micrometer.
Erythrocytes are well known to have no nucleus but in fact, they lack most organelles such as the Golgi apparatus endoplasmic reticulum and mitochondria. Hair consists of two parts the root and the hair shaft. The root is the part of the living hair located in the middle layer of the skin the dermis.
Epidermal root cells in some plants produce root hairs and tubular growths that increase the surface area of the root. Unlike other cells in the body, red blood cells do not have a nucleus. This habit dates back to when mammals began to evolve. Other vertebrates such as fish reptiles, and birds have erythrocytes that contain dormant nuclei. To allow red blood cells to carry an increased load of oxygen cells evolved to function without a nucleus and other associated organelles.
Learn more about Cell Types here:-brainly.com/question/342784
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Locations at latitude closer to the equator receive stronger and more direct sunlight than locations near the poles.
The plasma membrane<span> is described as a "fluid mosaic."</span>
1- Pyloric sphincter
2-Duodenum
3- Bile duct
4-Pancreatic duct
5-Esophagus
6-Lower esophageal sphincter
7-Fundus of stomach
8- Cardia
9-Body of stomach
10-Pyloric part
The <span>esophagus(5) connects to the stomach.</span>
<span> The food passes,from the pharynx, to the esophagus, to the stomach. This process is aided by peristaltic movements done by esophagus muscles.
This organ contains two sphincters:</span><span>the upper and the lower esophageal sphincter.
</span>The stomach is divided into four parts:
<span><span>1-The cardia (8) - this part is connected to the esophagus and its where the epithelium changes from stratified squamous to columnar.
In this region is the lower esophageal sphincter (6).
</span>2--The fundus(7)- It's formed by the upper curvature of the stomach.
3- the body(9)- is the main part; and the biggest
4-The pylorus/</span><span> Pyloric part (10) - is the lower region. This part is connected to the small intestine, the duodenum. In this region there is a </span>
strong ring of muscle called the (<span>1) Pyloric sphincter.
In the first part of the duodenum there is a connection with a duct that comes from the pancreas -4-</span>Pancreatic duct .
There is another duct that ends in the duodenum called- <span>Bile duct, that caries bile to digest fats.</span>