Yes, they compete for resources (light, water, nutrients), they can even compete for the attention of pollinators.
You get parasitic plants as well which live off other plants
vinegar is a acid. it is a strong acid. thats why it affect plants.
Yes they do affect the absorption of light in plants.
People affect plants by not watering them which causes the plants to die or the branches to fall off. We can leave a good affect by watering the plants because sometimes there is not enough rain and the plants start to die and fall apart.
The effect of hairspray for plants will be negative. This will block the stomata of the plants which may affect the process of transpiration in the plants and the alcohol in the hairspray may also choke the plants.
it affects it because they are plants
they affect our plants
No! :)
Yes, they affect both.
Steroids certainly do affect plants in a number of ways. Usually steroids will help plants grow to be very large and very hardy.
None. Plants don't have "vitamins".
Because plants absorb nutrients from the plants and animals.
yes