How does one cell become a brain cell and another a skin cell?

Where does sea-floor spreading occur? a) on seamounts b) at convergent plates c) at divergent plates d) near the ocean surface

Which term describes the difference in the concentrations of a substance across a cell's membrane? concentration gradient molecular concentration diffusion membrane concentration membrane

Which of the following disorders results from changes in an individual gene? A. Turner syndrome B. Klinefelter syndrome C. Trisomy 21 D. Sickle-cell disease

Which of the following is a type of tissue in plants that is dead at maturity? a. Parenchyma b. Sclerenchyma c. Collenchyma d. All of these are alive at maturity.

Proteins made by rough ER travel to the Golgi in sacks called?

It is appropriate for clients diagnosed with type 2 diabetes to take oral antidiabetic agents and forego recommended dietary changes.

If reviewers find the evidence or reasoning faulty, the manuscript can still be accepted. True or false

What does a graduated cylinder measure? i need this for my biology homework since I do not have my book with me at the moment.

How does heart rate change during and after an exercise is performed for two different periods of time?

The carbon cycle describes how carbon moves through the which of the following spheres? Select all that apply. A. Geosphere B. Cryosphere C. Atmosphere D. Hydrosphere E. Exosphere F. Biosphere