An example of codominance in the MN blood groups of humans (less famous than the ABO blood groups, but still important!). A person's MN blood type is determined by his or her alleles of a certain gene. An

LM

allele specifies production of an M marker displayed on the surface of red blood cells, while an

LN

allele specifies production of a slightly different N marker.

Homozygotes have only M or an N markers, respectively, on the surface of their red blood cells. However, heterozygotes have both types of markers in equal numbers on the cell surface.

A woman with type AB and type MN blood has a child with a man who has type O blood and type MN.

What are the odds their child will have type B and type M blood?

the correct answer is b. possesses the characteristic of compartmentalization of organelles, wherein the organelles are bound by membranes.

explanation:

the scientific method.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.