Steroid hormones bind to receptors inside the cell and alter their conformation. The hormone-receptor complex is then transported into the nucleus, where it can directly affect gene expression. To get from the location where the receptor binds the hormone to its site of action, the receptor-hormone complex must (circle one):
a) become water soluble by binding to a carrier molecule.
b) enter the smooth endoplasmic reticulum.
c) be transported through the nuclear pore complex.
d) undergo another conformational change.

c) be transported through the nuclear pore complex.

Explanation:

To alter gene expression, the hormone-receptor complex must be transported into the location where gene itself stored. Since gene stored inside nucleus, the hormone-receptor complex  have to reach it by getting inside nuclear pore complex. The complex will bind to specific region of the gene and will promote or inhibit the transcription of that gene.

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !