Many flowers produce nectar. what is a purpose of nectar? to remove excess water to shield petals from damage to attract birds and insects to trap pollen and bees

The correct answer would be to attract birds and insects to trap pollen and bees.

Nectar is sugar rich product produced by plants in order to attract insects.

The insects get the food in the form of nectar and in return they help in pollination and thus, help in reproduction of the plants.

This is also an example of mutualism in which plants and insects get benefits from each other.

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.  

yes it is weird but true