Answer:
Bisexual flowers:
In order to make a new seed male gamete present in a pollen grain units with the female gamete present in the ovule.
Unisexual flowers:
Unisexual flower can self pollinate where both male and female flowers are present on the same plant. Stigma of the female flower can be pollinated by the pollen of the male flower present on the same plant.
Answer:
Nitrogen about 77 percent of the atmosphere is composed of nitrogen
I,3,4,7 hope this will help
Answer:
Bubbles are nothing but the oxygen which arise around the green parts of the plant.
You can infer that the birds once had a common ancestor but became separated. Mutations in copying their genes stacked and caused changes in the beaks so the birds could be more well off or better adapted in their new environment.