Topisms In Plants

Question 1

Phototropism in shoots

Answer 1

Positively phototropic

Accumulates more auxin on the side in the shade.
Auxin stimulates growth in shoots, so the cells on the shaded side elongate faster, so shoot bends towards the light.

Question 2

Geotropism in shoots

Answer 2

Negatively geotropic

Accumulates auxin on the lower side.
Auxin stimulates growth in shoots, so the lower side grows faster, bending the shoot upwards.

Question 3

Phototropism in Roots

Answer 3

Negatively phototropic

Accumulates more auxin on the shaded side.
Auxin inhibits growth in roots, so root grows away from light.

Question 4

Geotropism in roots

Answer 4

Positively geotropic

Accumulates auxin on the lower side.
Auxin inhibits growth in roots, so the top side grows faster, bending the shoot downwards.