The carbohydrates found in the cell membrane function in

A) controlling transport in and out of cells.
B) cell recognition, the ability to distinguish one type of cell from another.
C) controlling the chemical reactions that occur in cells.
D) none of the above


B

Environmental & Atmospheric Sciences

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Marine and freshwater aquatic life zones are distinguished by their

A. nutrient concentration. B. dissolved oxygen. C. temperature. D. salinity. E. depth.

Environmental & Atmospheric Sciences

In which of the following locations can the smallest variation in day-to-day and month-to-month temperature be observed?

A. the Pacific coast of North America B. high in the mountains in the middle of a continent C. the centre of a large land mass D. a small island near the equator

Environmental & Atmospheric Sciences

The Schengen Agreement, signed in 1985, meant that

A) crossing a European border was not possible without government permission. B) crossing a European border required neither paperwork nor government approval. C) crossing a European was only available to people from countries that were EU members. D) crossing a European border became more difficult for the ethnic minority Roma. E) crossing a European border required passport and auto insurance documentation.

Environmental & Atmospheric Sciences

Changes in the DNA sequence of a gene in a cell that can be inherited by offspring are called ____.

A. adaptations B. mutagens C. mutations D. variable traits E. selected traits

Environmental & Atmospheric Sciences