What is an example of a positive form of thigmotropism? a) roots avoiding large rocks in the soil by growing and extending around them
b) roots growing laterally if there is too much resistance to them growing down
grapevine tendrils that coil around objects like stakes or trellises to stabilize
them
d)
mimosa plant folding its leaves when touched in an effort to keep them from
being eaten

d)mimosa plant folding its leaves when touched in an effort to keep them from being eaten.

Explanation:

grapevine tendrils that coil around objects like stakes or trellises to stabilize them

Explanation:

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.