Chemical signals in plants affecting the growth, activity and development of cells and tissues are
called
hormones
enzymes
auxins
phytochromes

Where does most of the photosynthesis occur in a plant?
stomata
guard cells
vascular cambium
mesophyll tissue

Which of the following is a basic requirement of plants?
sunlight
carbon dioxide
water
all of the above

You need to know how the structures of plant tissues and organs are directly related to their roles in physiological processes.

   Plant organs are limited to roots, stems, leaves, flowers, fruit and cones.

   Physiological processes are limited to photosynthesis, cellular respiration, transpiration, and reproduction.

   Plant tissues are limited to meristematic, ground, dermal and vascular tissues.

   Plant structures are limited to cambium, guard cells, phloem, seed, stomata and xylem.

Explanation:

the most logical answer would be a