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What are parallel lines seen on either cleavage planes or crystal faces?
Parallel lines seen on cleavage planes or crystal faces are usually caused by twinning, where two crystals grow together with a specific orientation relationship. This twinning can result in repeated patterns of parallel lines that are visible on the surface of the crystal.
Thin transparent membrane that separated a pair twins in utri is an indicator following modes of twinning?
The thin transparent membrane that separates a pair of twins in utero is typically indicative of diamniotic, monochorionic twinning. This means that the twins each have their own amniotic sac but share a single chorion. Twins that have separate chorions and amniotic sacs are known as dichorionic, diamniotic twins.
What causes a fetus to split?
A fetus can split during early pregnancy due to a process called twinning. This may occur when a fertilized egg splits into two separate embryos, leading to identical twins. It is a natural occurrence and happens randomly in about 1 in every 250 pregnancies.
What category of cloning does artificial embryo twinning fit?
Artificial embryo twinning is where an early embryo which has been produced through IVF is divided into several individual cells. This is at the stage where the embryo cells are not specialized yet. Each cell grows into an identical embryo in the lab. These embryos are then transferred into a host mother and identical cloned animals are born. So it uses normal sexual reproduction and essentially produces identical twins/triplets quadruplets but this is done in the lab instead of nature producing an identical twin. It is in no way similar to fusion cell cloning as used for Dolly the sheep. It falls in the category of embryo cloning.
What physical properties distinguish plagioclase feldspars from othoclase feldspars?
Plagioclase feldspars have a higher calcium content compared to orthoclase feldspars, as well as a different crystal structure. In terms of appearance, plagioclase feldspars often exhibit striations and twinning, which are less common in orthoclase feldspars.
