Conifers, also known as gymnosperms, have developed several key adaptations that allow them to survive in extreme environmental conditions. These adaptations include:
The thick cuticle on the leaves of conifers helps to reduce water loss by preventing excessive evaporation. This is especially important in dry or windy conditions where water retention is crucial.
Sunken stomata are stomata (pores) that are located deeper in the leaf surface. This adaptation helps reduce water loss by minimizing exposure to air currents and reducing the evaporation rate.
The needle-like leaves of conifers have a smaller surface area compared to broad leaves, which helps to minimize water loss. Additionally, the narrow shape and waxy coating on the needles help reduce water evaporation and protect the plant in cold or dry environments.
These adaptations—thick cuticle, sunken stomata, and needle-like leaves—allow conifers to thrive in harsh environments, making them well-suited for cold, dry, or windy regions.
List-I (Family/Characteristic, etc.) | List-II (Species/Examples) |
---|---|
(A) Myrtaceae | (I) Psidium |
(B) Hypanthodium inflorescence | (III) Fig |
(C) Caryophyllaceae | (II) Carnation |
(D) Asteraceae | (IV) Inula |
S.No. | List - I | List - II | List - III |
---|---|---|---|
I | Algae | Phaeophyceae | Sargassum |
II | Bryophyta | Hepaticopsida | Marchantia |
III | Pteridophyta | Pteropsida | Equisetum |
IV | Gymnosperms | Gnetopsida | Pinus |
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
The Plant Kingdom comprises all the plants that have some shared characteristics. These are bacteria (prokaryotes), photosynthetic plants, fungi, and several non-photosynthetic plants.
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Read More: Classification of Plants