Problem 22 - Objective Biology for NEET

Question

Sclereids are present in the pulp of (a) Guava (b) Pear (c) Sapodilla (d) All of these

Step-by-Step Solution

Answer

The correct option is (d) All of these.

Step 1: Analyze the options

Clearly the options represent different fruits: Guava, Pear, Sapodilla and an option stating all of these fruits.

Step 2: Evaluate Each Option

Sclereids can be found in not just one but many types of fruit. They are very commonly found in Guava and Pear, contributing to their characteristic texture. The Sapodilla fruit also contains sclereids. Hence all the given fruits contain sclereids in their pulp.

Step 3: Choose the Correct Option

Based on the analysis in Step 2, it can be concluded that the option 'All of these' is the correct answer, as all the fruits (Guava, Pear, Sapodilla) listed in the question contain sclereids in their pulp.

Key Concepts

Guava pulp

Guava pulp is a delightful and juicy part of the fruit, often savored for its unique taste and nutrient content. However, what many might not know is that guava pulp isn't all soft and smooth. This is due to the presence of tiny structures called sclereids.
Sclereids are a type of plant cell known for their hard, dense, and thickened cell walls. In guavas, they contribute to the gritty texture that is often noticed when consuming the fruit. These cells provide structural support to the fruit and contribute significantly to its firmness.

• Sclereids enhance the fibrous consistency of guava pulp.
• They play a crucial role in protecting the seeds within the fruit.
• The gritty texture acts as a deterrent to certain pests, which might otherwise damage the fruit.

Understanding the presence of sclereids demystifies why guava pulp has a distinctive texture that sets it apart from purely soft fleshy fruits.

Pear texture

Pears are known for their deliciously sweet and slightly gritty texture, which is quite distinct from other fruits. This grainy feel comes from the abundance of sclereids present in their flesh.
These stone cells are similar to those found in guava pulp, providing a crisp and granular mouthfeel. The presence of sclereids helps reinforce the fruit’s structure, maintaining its form even when ripe.

• Pear flesh is often considered pleasing because of its juicy yet gritty balance.
• The grittiness is due to sclereids dispersing throughout the parenchyma (soft tissue) of the fruit.
• Sclereids contribute to both pear's texture and durability during growth and ripening.

Next time you bite into a pear, remember that the crunchy texture is thanks to the sclereids interspersed within its juicy flesh.

Sapodilla

The sapodilla fruit, often enjoyed for its sweet taste, also contains sclereids, albeit less noticeably than guava or pear. Sapodilla, sometimes referred to as sapota, is a tropical fruit with a sweet and malty flavor profile.
Its flesh can appear more uniform and less gritty, but sclereids still have a role here.

• Sclereids are present in sapodilla to protect and offer support to the fruit structure.
• The cells help maintain the firmness as the fruit matures.
• Though less evident, they assist in safeguarding the internal seeds from external damages.

Sapodilla’s subtle texture doesn’t detract from its delicious taste, making it a popular choice in regions where it’s cultivated.

Fruit anatomy

Understanding fruit anatomy is crucial for grasping why different fruits have diverse textures. Anatomy refers to the structural composition and organization of tissue within the fruit, giving insight into the function and characteristics of various cells like sclereids.
In fruits where sclereids are present, such as guava, pear, and sapodilla, they play a significant role in determining texture and firmness.

• Sclereids are short, irregularly shaped structures that contribute to the mechanical strength of the plant tissue.
• They can be found throughout various tissues of a fruit, contributing to both protection and support.
• Their presence helps fruits endure physical stress and deters herbivores by adding a less palatable texture.

Through studying fruit anatomy, we gain a deeper understanding of plant biology and the ingenious ways fruits defend and nourish themselves.