yes
water
a thick fluid inside chloroplasts
nectar
because, a billion of years ago !
James A. Fay has written: 'Introduction to fluid mechanics' -- subject(s): Fluid mechanics 'Small scale tidal power plants' -- subject(s): Hydroelectric power plants, Tidal power-plants
Buoyancy is nothing related to plants. It is the property of a fluid to exert an upward thrust on a body emerged into it .
The power plants of the cell
Plants with tubes that can move fluid within themselves are known as vascular plants. These tubes, called xylem and phloem, transport water, nutrients, and sugars throughout the plant to support growth and metabolism. Vascular plants include ferns, flowering plants, conifers, and many others.
The sticky fluid on the micropyle of ovules
Vacuoles are membrane bound fluid filled sacs in plants.
Typically brake fluid is a petroleum base, so one drop won't typically hurt them but if emersed it will kill them.
The vascular tissue.Xylem is the tissue that caries the water from the roots to the leaves.Phloem is the tissue that carries the manufactured sugar from the leaves to where it is needed in the plant.