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Biology
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Describe how water is carried by the transpiration stream (7)

Transpiration is the water loss from the plant via evaporation. The transpiration stream is the flow of water through the plant xylem from the roots to the leaves of the plant. Xylem are thin tubes where ...

Answered by Biology tutor
7401 Views

Cells divide within organisms using a process called mitosis. When sex cells (gametes) are formed, they undergo a different process called meiosis. Describe three key differences between the two processes. (3)

The key differences between mitosis and meiosis are:-Mitosis produces 2 daughter cells, where as meiosis produces 4 daughter cells. (1)-Mitosis produces genetical...

HB
Answered by Hannah B. Biology tutor
2946 Views

Explain how an adult develops immunity to the toxin.

Adults can develop immunity to a toxin via being exposed to the toxin, whether this is by infection or vaccination. Since this toxin will be recognised as foreign by the body, this will stimulate an immun...

SS
Answered by Sereena S. Biology tutor
10439 Views

Explain how blood vessels help to regulate a human's body temperature (3marks)

The blood vessels dilate and widen, which means that the blood flows closer to the surface of the skin, so more heat is able to be released, which cools the overall body temperature.

BC
Answered by Bill C. Biology tutor
2859 Views

Describe the process of the light-independent reaction.

Carbon dioxide diffuses into the cell leaf through the stomata, and diffuses into the water surrounding the mesophyll cell walls (main site of photosynthesis-packed with many chloroplasts). From here, the...

DI
Answered by Davinia I. Biology tutor
7238 Views

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