Pine tree
The plant with slim needles designed to allow heavy snow to fall through is the coniferous tree, specifically species like the Eastern White Pine (Pinus strobus) or the Norway Spruce (Picea abies). These trees have needle-like leaves that are slender and flexible, preventing snow accumulation that could break branches. This adaptation helps them withstand heavy snowfall in their native habitats.
Plant needles are probably initially the result of evolutionary adaptations to deter herbivores and reduce water loss. The needle shape helps protect plants from being eaten by animals, while the small surface area reduces water loss through evapotranspiration.
Artichokes have thorny needles on their leaves as a defense mechanism to protect themselves from herbivores and predators. These needles discourage animals from eating them and help the plant conserve its energy for reproduction.
to allow non harmful particles through and keep harmful ones out
It is to protect the plant from any unwanted substances. It will only allow a few things to pass through that it needs. It's like our skin.
Pine tree
It helps them store the water in their stems because water can escape through the needles
Plant needles are probably initially the result of evolutionary adaptations to deter herbivores and reduce water loss. The needle shape helps protect plants from being eaten by animals, while the small surface area reduces water loss through evapotranspiration.
It is a Deciduous type.Trees with needles are Conifers.
produce glucose (sugars) through photosynthesis
to allow non harmful particles through and keep harmful ones out
Cactus needles have a number of functions. Firstly, because cactus plants live in deserts and semi-arid areas, the needles reduce the loss of moisture that normally occurs through evaporation. As the cactus is a "flowering plant", like all plants in this family it has leaves, but in this case, the leaves are the needles. there is very little surface area on the needles, so less moisture is lost through evaporation. Because of the shape of the needles, they also help capture whatever moisture is available. Dew and other forms of precipitation will tend to drip from the needles to the soil directly around the roots of a cactus, enabling the roots to utilise as much of the moisture as possible. Cactus needles also deter plant-eating animals.
Artichokes have thorny needles on their leaves as a defense mechanism to protect themselves from herbivores and predators. These needles discourage animals from eating them and help the plant conserve its energy for reproduction.
a plant pathogen, causing reed needles of species af Abies
to allow non harmful particles through and keep harmful ones out
There a plenty of adaptations plants have and this would be a long answer. with that said look at the cactus for example. This plant not only stores water within for a very long time but also has needles that do several different things. The needles of a cactus shade the the cactus, not having leaves means less need for water, the needles are able to slow water down when in falls on the plant, in order for the plant to collect as much water as possible and since this plant must store water for a long time, the needles protect it from predator's Also cactus are completely green, doing away with leaves and allowing the skin of the plant to do the photosynthesis needed.
It is to protect the plant from any unwanted substances. It will only allow a few things to pass through that it needs. It's like our skin.