Problem 146 - Objective Biology for NEET

Question

The tallest gymnosperms is (a) Sequoia (red wood tree) (b) Pinus (c) Cycas (d) Ginkgo

Step-by-Step Solution

Answer

The tallest gymnosperms is Sequoia (red wood tree).

Step 1: Understand the question

The question is asking about the tallest gymnosperms out of the given choices. These choices are Sequoia (red wood tree), Pinus, Cycas and Ginkgo.

Step 2: Recalling information about gymnosperms

Gymnosperms are a group of seed-producing plants. Among the given options, redwood trees, specifically Sequoia, are known to be the tallest.

Step 3: Answer the question

Given the four options – Sequoia (red wood tree), Pinus, Cycas, and Ginkgo – the tallest gymnosperms is Sequoia (red wood tree).

Key Concepts

Sequoia

The Sequoia, also known as the redwood tree, is a majestic giant of the plant world. These trees are famous for their incredible height, with some individuals growing over 300 feet tall. This makes them not only the tallest gymnosperms but also among the tallest organisms on Earth.
Its scientific name is Sequoiadendron giganteum, and it belongs to the Cupressaceae family. These trees have thick, fire-resistant bark that provides significant protection against natural elements, allowing them to live for thousands of years.
In fact, Sequoias are remarkable for their long lifespans, with some of the oldest trees estimated to be more than 2,000 years old.

• Sequoias grow primarily in the western United States.
• They thrive in moist, foggy environments.
• These trees play a crucial role in their ecosystems, providing habitat and stability.

This unique adaptability and sheer size make the Sequoia an awe-inspiring gymnosperm.

Pinus

Pinus, commonly known as pine trees, are a diverse genus of coniferous trees in the family Pinaceae. They are easily recognizable by their needle-like leaves and elongated cones.
Pines are incredibly versatile and can be found in various environments across the globe, from cold northern regions to subtropical climates. Their adaptability to different climates has allowed them to spread widely.
Pinus species are not the tallest gymnosperms but are notable for their:

• Hardy nature, able to withstand poor, rocky soils.
• Commercial importance, providing wood and resin.
• Long lifespan, with some trees living for several centuries.

These trees also play ecological roles by providing habitats and food for wildlife. Their resilience and usefulness have ensured they remain a staple in both natural and human-modified landscapes.

Cycas

Cycas is a genus of plants often mistaken for palms due to their similar appearance. However, they are actually part of a separate group of gymnosperms known as cycads. Cycas plants have thick, woody trunks and a crown of large, stiff, feather-like leaves.
These plants have been around for millions of years, often referred to as "living fossils" due to their ancient lineage.

• Cycas can be found in tropical and subtropical regions worldwide.
• They prefer well-drained soils and sunny locations.
• Some species are used ornamentally in gardens and parks.

Despite their ancient roots, Cycas plants do not grow as tall as the Sequoia or some other gymnosperms. Nonetheless, they stand out due to their unique and striking appearance.

Ginkgo

Ginkgo, often hailed as a "living fossil," is a distinct type of gymnosperm with no close living relatives. The sole surviving species of its division, Ginkgo biloba, is easily recognizable by its fan-shaped leaves.
Ginkgo trees have an ancient lineage, with ancestors dating back over 270 million years, even before dinosaurs roamed the earth.

• They are native to China and have been cultivated for thousands of years.
• Ginkgo trees are resilient to pollution and pests.
• They're often used in urban landscaping due to their hardiness.

The Ginkgo's adaptability and resilience make it a fascinating subject of study, although it does not achieve the towering heights of Sequoias. Its health benefits and historical significance further enrich its intriguing profile.