In humans, identical twins are possible because C. early blastomeres can form a complete embryo if isolated.
Identical twins are formed when an egg after fertilization by a sperm gets divided into two.
The early blastomeres are totipotent cells which means that they have the capability to form all the cells of the body further. Hence, if an egg after fertilization splits into two, it has the potential to form a complete embryo which forms an individual.
However, as the splitting process has occurred after fertilization, hence the two individuals formed will be identical twins. The genome for the identical embryos will be identical.
Identical twins are also referred to as monozygotic twins as they arise from a single egg or zygote.
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Answer:
Cilia /flagella aids in movement.
Explanation:
Cilia and flagella helps in cellular movement.Bacteria contain flagella which helps in the propelling of bacteria towards nutrients or away from the waste materials.On the other hand cilia are threadlike appendages that helps in the attachment of bacteria to solid surface.
In human body respiratory system contain cilia which help to move mucus ,dust,germs and polens out of the body.
The tail of human sperm contain flagella which helps in the in the swimming of sperm inside the ovary in search of an egg.
The condition consisten with the protrusion of the membranous sac that encloses the abdominal contents through an opening in the abdominal wall into the umbilical cord is called Omphalocele
Red blood cells will swell and burst.
The reason behind this is that red blood cells are okay when they are in the plasma (the watery part of the blood) because the solutes in plasma are so well balanced that plasma is rendered isotonic. An isotonic solution is a type of solution that has the same salt concentration as its surrounding environment and thus the substances around it e.g. cells neither gain nor lose water. In the blood plasma, the red blood cells neither lose nor gain water and so they remain intact.
However distilled water is hypotonic (has less or no solutes) and therefore osmosis will take place when red blood cell which have a higher solute concentration are placed in it. Water molecules will leave the distilled water and pass into the red blood cells through the semi-permeable membrane of the cells in an attempt to equalize the difference in osmotic pressure on either side of the membrane. In so doing, water will accumulate in the cell which will then swell to capacity and ultimately burst.
The answer is B (speed up chemical reactions).
