Problem 165 - Objective Biology for NEET

Question

The height of eucalyptus tree is approximately (a) \(100 \mathrm{~m}\) (b) \(1000 \mathrm{~m}\) (c) \(10 \mathrm{~m}\) (d) \(10-20 \mathrm{~m}\)

Step-by-Step Solution

Answer

The height of a eucalyptus tree is approximately 10-20m.

Step 1: Search Reliable Sources

This step involves looking up the information from reliable sources such as textbooks, verified internet sources, or from knowledge gained in related studies. Since it is a fact-based question, recall that the height of a eucalyptus tree does not generally reach 1000m, neither is it as low as 10m.

Step 2: Evaluate Options

The options left are 100 m and 10-20 m. A quick search or general knowledge about eucalyptus trees tells us that the height of most eucalyptus trees is not 100m. Trees of such great heights are very rare species.

Step 3: Choose the Correct Answer

Upon a process of elimination and fact checking, the correct answer would be '10-20 m'. This range is often the typical height of eucalyptus trees.

Key Concepts

Plant Height Measurement

Measuring the height of a plant or tree can be done in several ways, depending on the size of the plant. For shorter plants, a ruler or tape measure can suffice. For taller trees, like eucalyptus, a bit more technique is needed.
Here are some simple methods to measure tree height:

• The Clinometer Method: Use a clinometer to measure the angle of elevation to the top of the tree from a known distance. Using trigonometry, the height can then be calculated.
• The Shadow Method: Measure the shadow of both the tree and a stick of known height. Calculate the tree height using proportions.
• Sight Method with a Stick: Hold a stick vertically at arm's length. Align it with the height of the tree through your line of sight, and use similar triangles to find the height.

These methods ensure you can accurately gauge a tree's height without having to climb it.

Tree Species Identification

Identifying a tree species like the eucalyptus is more than just looking at its height. Eucalyptus trees are easily recognizable due to several distinct features:

• Leaves: Generally, eucalyptus leaves are long, narrow, and have a unique fragrance when crushed.
• Bark: The bark can vary greatly among species but often appears smooth and can peel off in strips.
• Flower Color: Eucalyptus flowers can range from white to pink, red, or even yellow, without noticeable petals.

By familiarizing yourself with these characteristics, you can more easily identify a eucalyptus tree in a natural setting. Remember, knowing the species helps in estimating the typical height and understanding the habitat.

Botany Fact Question

Fact-based questions in botany, like the height of a eucalyptus tree, require validating information from trusted sources. Understanding common statistics of the species helps in quickly answering such questions. Typically, eucalyptus trees range in height from 10 to 20 meters, although some species can grow taller.
When faced with a botany question:

• Refer to Trusted Sources: Reliable textbooks or research studies provide accurate information.
• Use General Knowledge: Over time, common facts about plants and trees can help in quick decision-making.
• Eliminate Impractical Options: Heights of 1000 meters are unattainable for eucalyptus, making some answers easy to discard.

These strategies ensure that your answers are precise and informed, aligning with scientific understanding.