Sentence examples for are surrounded by two from inspiring English sources

They are surrounded by two other types of cells, which become the placenta and another structure, the yolk sac.

The pce genes are surrounded by two copies of nearly identical insertion sequence (IS) elements that contain a gene homologous to the IS256 family transposase; therefore, the pce genes can function as a typical composite transposon.

In WT cells, HMR contains a silenced copy of mating-type gene including HMR A1 (and and HMR A2 (A2), which are surrounded by two silencers, silencer E (E) and silencer I (I).

It is named for its large dome-shaped cardinal red flowerheads, which bear 210 individual flowers and are surrounded by two rows of dark red bracts.

Inside the building is another unique feature for schoolhouses of the time the coat rooms are surrounded by two semi-circular front walls in the original wing of the building.

Its three open reading frames gag, pol, and env are surrounded by two long terminal repeats or LTRs.

These continents are surrounded by four major bodies of water: the Arctic, Atlantic, Indian, and Pacific oceans.

The headquarters are surrounded by six checkpoints that might have stopped a suspicious car.

Capsomers on the triangular faces are surrounded by six others and are called hexons.

Capsomers at the apices are surrounded by five other capsomers and are called pentons.

Your gorgeous valley with gentle rolling, vineyard-covered hills are surrounded by four snow-capped peaks in the winter.