Question

The largest cell measuring …………, is the egg of an ostrich.
(a)130 nm - 150 mm
(b)130 nm - 180 mm
(c)130 nm - 170 mm
(d)170 nm - 190 mm

Answer 1

Hint The egg of the ostrich (genus of Struthio) is the largest of all living birds. The shell features a long history of use by humans as a container and for decorative artwork. The eggs are not commonly eaten.

Complete answer:
The cell is the basic structural and functional unit of life and its size may vary from 0.5 micrometers to 100 micrometers. An egg of the ostrich is a single-celled structure and known as the largest cell in the world with a size of 130 mm-170 mm. They are glossy cream-colored, with thick shells distinct through small holes. These eggs are placed in one communal nest known as a dump-nest, and this can carry as many as 60 eggs at a particular time. The dominant female ostrich lays her eggs first before the other ostriches can lay theirs also. The incubation period is of about 35 to 45 days, which is quite less compared to other ratites (birds). This is believed to be the case because of the high rate of predation.

Additional information:
The ostrich eggs are hatched through both the Male and the female ostriches which possess to go round and remain on these eggs. The females whose grey-brownish feathers simply blend with sand sit on the eggs throughout the day while the males whose black feathers that build them almost unnoticeable at night sit on the eggs by the night. This method assists them to camouflage and protect and hide from their predators.

So, the correct answer is ‘130 nm - 170 mm’.

Note: An Ostrich egg is the biggest egg of any well-known living bird being 6 inches (which is 15 centimeters) in diameter and may weigh up to 1.3 kilograms. This weight is similar to 24 (two dozen of a hen’s eggs). Generally, the male protects the hatchlings and teaches them to feed, even though males and females cooperate in rearing chicks.