What is the function of needle-like leaves of conifers?

Conifers have needle-like leaves to hold more moisture and reduce wind resistance. The long, rolled needles can hold water throughout the year, even…

What is the use of needle-like leaves to Cycas?

Answer. The needles hold several adaptive qualities that allow them to survive growing in areas that challenge most plants, such as places with heavy snowfall or where soils become very dry. Sloped branches of cycas prevent the accumulation of snow on its branches.

What are needle-like leaves?

Conifers have leaves that resemble needles and generally remain on a tree year-round. They are replaced slowly and continuously.

How do needle-like leaves reduce water loss?

As plants can lose a lot of moisture through their leaves, many have evolved leaves that reduce water loss. These include much smaller, thinner, needle- shaped leaves to reduce the surface area. This reduces the amount of water that can evaporate from the leaves.

Which of the following plants bears needle like leaves?

Coniferous trees: The trees that have straight and tall trunks to protect them from winter are called coniferous trees. They have needle- like leaves. The main plants of these areas are pine, spruce, cedar (deodar), and fir trees.

Which forest has needle like leaves?

coniferous forest, vegetation composed primarily of cone-bearing needle-leaved or scale-leaved evergreen trees, found in areas that have long winters and moderate to high annual precipitation. The northern Eurasian coniferous forest is called the taiga or the boreal forest.

How do needle like leaves help the plants in cold regions?

A. Some trees in colder climates have evolved with needle-like leaves because these leaves offer greater protection in extreme weather. Broad leaves are more effective in food production, but smaller-surfaced needles can withstand damage from wind and snow and they lose less water.

Why do Christmas trees have needle like leaves?

The leaves on Conifers are called needles

The needles are also coated with wax which prevents the loss of water and are soaked in resin which helps the needle withstand freezing. Even the shape of the needles is an asset in winter because it offers no resistance to the wind.

How do needle like leaves help Pine tree for Class 4?

1) Needle shape helps the leaves to retain moisture, preventing water loss as the stomatas are sunken and tightly packed in needle like leaves. 2)Needle shape gives them ability to shed snow as pine trees are found in cold regions.

Why do plants have pointy leaves?

Dr Dana Royer, who authored the study with Dr Peter Wilf at Pennsylvania State University, says that the jagged, pointy edges on leaves are packed with xylem, a tissue that transports water and nutrients in sap. Most of the liquid evaporates by leaving the teeth through minuscule pores.

Why do some trees lose their leaves in winter?

Winter temperatures cause the production of auxin to slow down and this breaks the abscission layer, causing the leaves to detach from the trees. Losing leaves helps the tree to retain water during in the winter and means that it needs less energy to stay alive. The fallen leaves help to add nutrients to the soil.

What is the advantage of a needle over a flat leaf?

Needles have lower wind resistance than big, flat leaves, so they’re less likely to make the tree fall over during a big storm. Needles are tough for insects to eat.

Why might some plants have thorns?

Although it has been shown that in some plant families, such as cacti, spines arose primarily as a mechanism to reduce water loss from leaves, most plants that have spines use them to protect themselves from hungry animals.

What are toothed leaves?

TOOTHED: A type of leaf margin that has small points along it (teeth). Fine-toothed means that the teeth are small. Course-toothed means that the teeth are large. Single-toothed means that all the teeth are about the same size.