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Which substances may pass through a cell membrane by simple diffusion?
asexual reproduction
carbon dioxide and water
water
Both birds eat the same types of food.
continue to move across the membrane in both directions
Membrane proteins
active transport
Adaptation
Facilitated diffusion move substances across the membrane with the aid of:
asexual reproduction
carbon dioxide and water
water
Both birds eat the same types of food.
continue to move across the membrane in both directions
Membrane proteins
active transport
Adaptation
The different beaks Darwin observed in the finches were probably NOT caused by...
asexual reproduction
carbon dioxide and water
water
Both birds eat the same types of food.
continue to move across the membrane in both directions
Membrane proteins
active transport
Adaptation
Charles Darwin observed the finches on the Galapagos island and noticed that each species was well suited to the life it led due to the size and shapes of its beaks. Beak shape and size in these finches is an example of —
asexual reproduction
carbon dioxide and water
water
Both birds eat the same types of food.
continue to move across the membrane in both directions
Membrane proteins
active transport
Adaptation
Facilitated diffusion allows certain kinds of compounds that are normally blocked by the cell membrane to cross the cell membrane. All of the following are examples of compounds that move by facilitated diffusion except
asexual reproduction
carbon dioxide and water
water
Both birds eat the same types of food.
continue to move across the membrane in both directions
Membrane proteins
active transport
Adaptation
During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will ___.
asexual reproduction
carbon dioxide and water
water
Both birds eat the same types of food.
continue to move across the membrane in both directions
Membrane proteins
active transport
Adaptation
Even though the finch and the sparrow are two different types of birds, they have similar beaks. Which statement best explains why their beaks are similar?
asexual reproduction
carbon dioxide and water
water
Both birds eat the same types of food.
continue to move across the membrane in both directions
Membrane proteins
active transport
Adaptation
The movement of particles through proteins in the cell membrane against the normal direction of diffusion is called ___.
asexual reproduction
carbon dioxide and water
water
Both birds eat the same types of food.
continue to move across the membrane in both directions
Membrane proteins
active transport
Adaptation
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