Ateacher taps on a hardboiled egg until cracks appear on the surface. she gently presses the egg between her fingers and thumb. the students observe some changes in the egg shell, a few of which are presented in the table. what is the teacher trying to model?

a) weathering of rocks
b) retreating glaciers
c) formation of volcanoes
d) tectonic plate movements

Option (D)

Explanation:

The boiled egg is considered to be one of the good models to demonstrate the interior of the earth, as it shows the layers of the earth's interior. The yellow yolk portion of the egg describes the core of the earth, the white proteinous part describes the mantle and the outer hard shell of the egg describes the crust of the earth.

So, in the given condition, the teacher is trying to explain the Plate tectonic theory, where the lithosphere of the earth is divided into numerous plates and how these plates move over the layer of the asthenosphere.

Thus, the correct answer is option (D).

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.