The guard cells's placement surrounding the stomata is advantageous because, when they're closed in low humidity/moisture conditions, they prevent the loss of water from the leaves. When moisture levels are high, they swell and allow the stomata to open.
An advantage of a plant or tree having small leaves is not needing much water.
The only coin evolution pays in is reproductive success. Having two children who leave no offspring would not give you an advantage over having one child who leaves many offspring. Or any combination thereof. Twinning is a developmental thing of egg doubling or fraternal twins being just like siblings. So, the act of twinning would not seem to confer any more advantage in and of itself, but twins having successful offspring that drive many parental genes to fixation in a population of organism would be reproductively successful that way.
Cacti have spines. Evolutionary theory is that the spines were originally leaves, but which reduced in size and form to carry out a new function, as spines, to protect the plant from predators. According to the same theory the stem of the plant became the gas exchange and the 'chlorophyll-containing' 'photosynthesis' part of the plant, thus replacing the functions formerly carried out by and through the leaves.
"Plant cuticles are a protective waxy covering produced only by the epidermal cells [1] of leaves, young shoots" -wikipediaThe cuticle is a thin layer of wax which helps waterproof leaves and makes it harder for water to evaporate or transpire from the leaves of a plant. It is a evolutionary adaptation for plants which live in arid climates. The following is a diagram of plant tissue:http://en.wikipedia.org/wiki/File:Leaf_anatomy.svg
to get the full surface area of their leaves facing the sun, so they can't photosynthesis as much as possible.
self pollination
what is the relation is there between the position of the buds and the position of the leaves
what is the relation is there between the position of the buds and the position of the leaves
Flowers originated from [the] Specialization due to [and resulting from] the accumulated evolutionary Adaptations of Leaves. Ordinary leaves respire, grow and Photosynthesize.
Harder the better. Waxy leaves minimize the loss of water by transpiration
The needles are the leaves of the tree, which allow it to carry out photosynthesis and produce food
No...i dont think it's even possible! It's possible if you eat them and they are leaves of hemlock or rhubarb.
no, it is not possible for them
Yes. Cactus do not have leaves.
Why certainly.
An advantage of a plant or tree having small leaves is not needing much water.
yes it is..