Squid ward is a squid. So whats his 'nose'

Which contribution did Copernicus make to our view of the solar system? A.
He proposed the sun-centered model of the solar system.


B.
He showed that planets moved in elliptical orbits.


C.
He proposed that gravity kept the planets in their orbits.


D.
He proposed the earth-centered model of the solar system.

If a tube containing a 10% sugar solution is covered at one end by a semipermeable membrane and isplaced in a beaker containing a 5% sugar solution, what will most likely happen to the water?
A. Water will only enter the tube.
B. Water will only leave the tube,
C. There will be no water movement in the tube.
D. Less water will enter the tube than leave the tube.

A Scientist Finds An Unusual Living Thing And Decides To Study It.

A model of pluripotent vs differentiated cellular gene expression is shown. Pluipotency is found in stem cells that have the ability to become multiple types of cells. Differentiation is the process where a cell becomes specialized and cannot return to its pluripotent state. What explanation best supports the model of pluripotency and differentiation shown above?A) Differentiated cells have different DNA sequences that pluripotent cells and can produce different protein products.
Eliminate
B) Differentiated cells have fewer gene sequences that pluripotent cells and can only produce limited numbers of proteins.
C) Pluripotent cells recruit molecules from nearby cells to increase gene expression while differentiated cells use only internal transcription factors.
D) Differentiated cells and pluripotent cells have different types of activator or repressor proteins present that positively and negatively regulate gene expression in the cell.

Explaining how biodiversity is affected by natural selection

The original remains of ancient animals such as saber-toothed cats have been perserved in _____.