Answer:
The plants in a specific environment be impacted if there was a sudden drop in the amount of bacteria present in that area, there are positive and negative consequences associated with this situation.
Positive:
The decrease in bacterial colonization will prevent the plant from the diseases caused by the bacteria and this will promote plant growth. Like, black rot in Brassica caused by Xanthomonas campestris, bacterial canker in tomato, capsicum and chilli caused by Clavibacter michiganesis.
Negative:
Plants remains in symbiotic relationship with bacteria in order to obtain impermeable inorganic minerals from the soil. In the absence of bacteria, the plants will not receive these nutrients, and their growth may be hampered. Example bacteria fixes atmospheric nitrogen which is taken up by the root nodules of leguminous plants. In return these bacteria gets the food like carbohydrates produce by the plants.
The right answer is c. anther; stigma.
Pollination is the fertilization necessary for sexual reproduction of flowering plants. It corresponds to the transport of the pollen grains produced by the male organs of the plant (anthers) towards the female organs (stigmas). The wind, some birds, some small rodents but mostly insects provide this service. The small population of pollinators is primarily insects and, essentially, wild or domestic bees.
Hypotheses uses evidence to make generalizaitons