Consider the following statements about the size of eggs in animals: 1. All animal eggs are microscopic. 2. The ostrich egg is the largest. 3. Hen's eggs are large enough to be seen without a microscope. Which of the statements given above is/are correct?

Correct Option The correct option is (c) 2 and 3 only. Explanation Cells exhibit a wide range of sizes. While the majority of animal cells are microscopic and measured in micrometers, certain reproductive cells (eggs) in birds and reptiles are macroscopic and can be observed with the naked eye. Statement-wise Analysis - Statement 1 is Incorrect. Not all animal eggs are microscopic. While the eggs of many organisms (such as mammals) are microscopic, the eggs of birds and reptiles are significantly larger. - Statement 2 is Correct. The egg of an ostrich is the largest known single cell in the animal kingdom. It measures approximately 170 mm × 130 mm. - Statement 3 is Correct. A hen’s egg represents a single cell (the yolk being the ovum) and is large enough to be seen without the aid of a microscope. The hard shell and albumen are protective layers surrounding this single cell. Key Takeaway While most cells are microscopic, the eggs of birds are exceptions. The ostrich egg is the largest single cell, and a hen's egg is a macroscopic single cell visible to the naked eye.

Consider the following statements about the size of eggs in… - NCERT Class 8 Science MCQ

NCERT Class 8 Science — Chapter 3: Reproduction in animals

mcqeasy

Consider the following statements about the size of eggs in animals:

All animal eggs are microscopic.
The ostrich egg is the largest.
Hen's eggs are large enough to be seen without a microscope.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 8 · Page 68

Options

A1 and 2 only
B2 only
C2 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (c) 2 and 3 only.

Explanation

Cells exhibit a wide range of sizes. While the majority of animal cells are microscopic and measured in micrometers, certain reproductive cells (eggs) in birds and reptiles are macroscopic and can be observed with the naked eye.

Statement-wise Analysis

Statement 1 is Incorrect. Not all animal eggs are microscopic. While the eggs of many organisms (such as mammals) are microscopic, the eggs of birds and reptiles are significantly larger.
Statement 2 is Correct. The egg of an ostrich is the largest known single cell in the animal kingdom. It measures approximately 170 mm × 130 mm.
Statement 3 is Correct. A hen’s egg represents a single cell (the yolk being the ovum) and is large enough to be seen without the aid of a microscope. The hard shell and albumen are protective layers surrounding this single cell.

Key Takeaway

While most cells are microscopic, the eggs of birds are exceptions. The ostrich egg is the largest single cell, and a hen's egg is a macroscopic single cell visible to the naked eye.

Your note

More from Chapter 3: Reproduction in animals

With reference to the social organisation in a honey bee hive, consider the following statements: 1. The queen bee is responsible for building the hive. 2. Worker bees are females responsible for building the hive. 3. Drones are male bees that develop from unfertilised eggs. Which of the statements given above is/are correct?

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Consider the following statements about the female reproductive system: 1. Oviducts are also known as fallopian tubes. 2. The uterus is a paired structure located on either side of the abdomen. 3. Fertilisation usually takes place in the oviduct. Which of the statements given above is/are correct?

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Consider the following statements about "Binary Fission": 1. It is a method of asexual reproduction. 2. It is observed in multicellular organisms like Hydra. 3. It involves the division of the body followed by the division of the nucleus. Which of the statements given above is/are correct?

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In the context of hen reproduction, consider the following statements: 1. Hens undergo internal fertilisation. 2. The hard shell of the egg is formed after the egg is laid. 3. The embryo takes about 3 weeks to develop into a chick. Which of the statements given above is/are correct?

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Consider the following statements regarding asexual reproduction: 1. It involves only a single parent. 2. Hydra reproduces by a method called binary fission. 3. Amoeba reproduces by a method called binary fission. Which of the statements given above is/are correct?

easy

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