After Twins Are Conceived, Their Chance of Survival Until Birth

question 108

Multiple Choice

After twins are conceived, their chance of survival until birth depends on the prenatal circumstances. An early sonogram might reveal two developing organisms, but later only one embryo continues to grow. This is referred to as the _____ twin phenomenon.

• A) vanishing
• B) disappearing
• C) terminated
• D) missing

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Definitions:

Sedimentary Rocks

Rocks formed by the accumulation and consolidation of sediment, often containing fossils of plants and animals that lived millions of years ago.

Sedimentary Rocks

Rocks formed from the accumulation and cementation of mineral and organic particles, often in layered deposits.

Tilted Sequence

Layers of rock that have been moved from their original horizontal position to an angle due to tectonic forces.

Granite

A coarse-grained igneous rock composed mainly of quartz, feldspar, and mica, known for its durability and widely used in construction.