Question Discussion & Solution

The correct answer is Bone-marrow.

Key Points

Red blood cell:

• Red blood cells (RBCs) are the most common type of blood cell and the vertebrate's principal means of delivering oxygen to the body tissues via blood flow through the circulatory system.
• RBC is formed in Bone Marrow.
• RBCs take up oxygen in the lungs, or in fish the gills, and release it into tissues while squeezing through the body's capillaries.
• The cytoplasm of erythrocytes is rich in hemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red color of the cells and the blood.
• Each human red blood cell contains approximately 270 million of these hemoglobin molecules.
• The cell membrane is composed of proteins and lipids, and this structure provides properties essential for physiological cell function such as deformability and stability while traversing the circulatory system and specifically the capillary network.

Additional Information

• Red blood cells are thus much more common than the other blood particles: there are about 4,000–11,000 white blood cells and about 150,000 - 400,000 platelets per microliter.
• Human red blood cells take on average 60 seconds to complete one cycle of circulation.
• The blood's red color is due to the spectral properties of the hemic iron ions in hemoglobin.
• Each hemoglobin molecule carries four heme groups; hemoglobin constitutes about a third of the total cell volume.
• The normal pH range of blood is between 7.35 to 7.45. This means that blood is naturally slightly alkaline or basic.

The Correct Answer is "boron deficiency".

• Boron deficiency is a deficiency of the micronutrient boron in plants.
• It causes large losses in crop production and crop quality
• It affects the vegetative and reproductive growth of plants, resulting in inhibition of cell expansion, death of meristem, and reduced fertility.

​Important Points

• Boron deficiency in sugar beets characteristically causes the death of the growing point and the development of blackheart rot.
• Before the deficiency has reached this stage, the leaves, which may have cracked petioles, will have become progressively smaller and somewhat misshapen.
• After the death of the growing point, small bunches of leaves develop in the older leaf axils and the crown is very liable to become hollow and rot.

Additional Information

• The hollow heart is an internal disorder where a 'lens' or 'star'-shaped cavity forms in the tuber.
• It appears to be caused by an abrupt change in tuber growth rate which usually occurs after a period of stress.
• Water, heat stress and associated calcium deficiency appear to have a role in the development of a hollow heart.
• The crisp variety Atlantic and the French fry variety Russet Burbank are prone to hollow heart but if conditions are right most varieties can be affected.
• Hollow heart is an important problem for the potato industry as payments from processors and washer-packers for fresh market potatoes may be reduced. 

Elements of diagram are moving in clockwise direction and 1 dot is added in each step.

The complete diagram is as follows,

The code for ‘IRONIC’ would be ‘#!?@#&’.

The correct answer is Pooja Kadian.

• Pooja Kadian was the first Indian to receive the title of world champion in Wushu in 2017.

Key Points

• Pooja Kadian won the gold in women’s 75kg category.
• Pooja defeated Evgeniya Stepanova of Russia in the final.
• The event was held at Kazan in Russia.
• Praveen Kumar was the first Indian man to win a gold medal at the Wushu World Championships.
• Praveen defeated Philippines' Russel Diaz in the 48kg category. 

Additional Information

• Wushu Sanda is a martial art which combines full-contact kickboxing, including close-range punches and kicks, with wrestling, takedowns, throws, sweeps and kicks catches.