Ans.
Sickle cell anemia is defined as a genetically inherited disorder that causes deformation of red blood cells (RBCs) and inadequate oxygen transport. It is caused by a mutation in the gene that encodes for hemoglobin and leads to formation of a defective protein.
The RBCs transport oxygen to the various parts of body with the help of hemoglobin molecules. Due to defective hemoglobin, blood cells become sticky and rigid, and shape like sickles. The resulting sickle-shaped cells get stuck in blood capillaries that block or slow down blood flow or oxygen transport to the body organs.
Thus, 'sickle cell anemia affects oxygen transport in the body.'
A genetic disorder in which the deformation of red blood cells occurs due to which transportation of oxygen is hindered is called sickle cell anemia.
Further Explanation:
The inherited form of anemia is sickle cell anemia. It is a condition during which the body contains an inadequate amount of red blood cells to fulfill the required supply of oxygen in the body. The normal red blood cells are round and flexible and move with ease through the blood vessels. The defective red blood cells during sickle cell anemia appear like a crescent moon and become sticky and rigid. These defective cells cannot pass the blood vessels and get stuck in between. It may lead to a stoppage and slow down of blood flow, which in turn also obstructs the passage of oxygen throughout the body.
The gene mutation is the cause of the anemia. This gene is responsible for the production of haemoglobin. Haemoglobin is an iron-rich compound which provides the blood with its red color. The red blood cells carry oxygen with the help of hemoglobin, which binds oxygen. Abnormal hemoglobin is produced during sickle cell anemia, which makes the red blood cells rigid and sticky.
These defective genes are passed from parents to the offspring and generate an inheritance pattern, which is called autosomal recessive inheritance. This means both the parents must transfer the defective allele to produce an affected child. If a person inherits a sickle cell gene from only one parent, he/she is a carrier of the disease. This implies that the person can further pass on the gene to his/her progeny.
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Answer Details:
Grade: High School
Chapter: Sickle Cell Anaemia
Subject: Biology
Keywords:
Anemia, sickle cell anemia, red blood cells, oxygen, hemoglobin, blood vessels, mutation, inheritance pattern, autosomal recessive, iron-rich compound, blood, allele, gene.
b. stolons
c. corms
d. meiosis (I believe it is A correct me if I'm wrong)
Answer: b. stolons
Explanation:
The strawberry plants reproduce asexually by stolons which are also called as runners. These stolons grows over the ground and they produce structure which are called as nodes. The roots of new plants originated from these nodes. After rooting a shoot originate above the ground. The new plants are identical to the mother plants.
B) behavioral isolation
C) ecological competition
D) founders arrived
Answer:true
Explanation: cause heterozygous means that 2 or more of offspring genes are recessive
Approximately 90 naturally occurring elements have been found in nature.
Elements are the fundamental building blocks of matter, and they cannot be broken down into simpler substances by chemical means. As of my knowledge cutoff in September 2021, there are 118 known elements in total, with 94 of them being naturally occurring or stable elements. Out of these naturally occurring elements, some are relatively abundant in the Earth's crust and are essential for life, while others are rare and occur in trace amounts.
The most abundant elements in the Earth's crust are oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium. These elements make up the vast majority of the minerals and rocks that form the Earth's surface.
Some elements, like carbon, hydrogen, nitrogen, and oxygen, are essential for life and are the building blocks of organic compounds, such as carbohydrates, proteins, lipids, and nucleic acids. These elements play a crucial role in the biochemistry of all living organisms.
On the other hand, there are elements that are extremely rare and occur in trace amounts, such as gold, platinum, and iridium. These elements have unique properties and are often valued for their scarcity and various industrial applications.
Elements can be found naturally in various forms, including minerals, ores, gases, and dissolved in water bodies. The study of elements and their properties is central to chemistry, physics, geology, and many other scientific disciplines, as it helps us understand the composition of the Earth, the universe, and the chemical processes that govern our world.
To learn more about elements, here
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