How did water get into the coconut?

Coconut water is the endosperm part of the coconut plant. Endosperm is the most common nutritive tissue for the development of embryos in flowering plants. It supply nutrients to the growing embryo. The water is taken by all plants to prepare their food and for transporting the food throughout the plant body.

There are three types of endosperm and the coconut endosperm is a nuclear type in which theendosperm is found as a clear fluid in which float numerous nuclei of various sizes.

This fluid is compactly filling the embryo sac in which the embryo is developing.At a later stage gradually these cells and free nuclei start settling at the periphery of the cavity and layers of cellular endosperm start appearing. This forms the coconut meat. This meat is very tender enclosing the fluid content called coconut water. At this stage the nut is called tender coconut. The quantity of the cellular endosperm increases further by the divisions of the cells. In
mature coconut the liquid endosperm becomes milky enclosed by the cellular part called kernel and it does not contain free nuclei or cells.

How does the tail of lizard grow into exactly the same shape?

Not all lizard species are capable of shedding their tails, only those that can have fracture points in their vertebrae. The lizard’s blood vessels in the tail area rapidly constrict after autotomy to ensure minimal blood loss. The muscles in this area are also adapted to provide easy shedding of the tail.

After a lizard drops its tail it will start to grow back a new one, however the new one will not look the same as the original. It may have different colors, shape and size.

If snake has venom in its teeth, how come it does not die when it bite and eat its prey?

Yes, if a venomous snake bites itself and injects a considerable amount of venom, it could quite easily die. Remember that the venom itself never comes into contact with the snake's bloodstream - it is stored in venom glands behind the snakes eyes and injected through the fangs into the prey item, and then the prey item is swallowed into the stomach, never touching the blood.