The cells which form during cleavage and surround the fluid filled cavity are called d) blastomeres.

Here's a step-by-step explanation:

1. Cleavage is the process in animal development after fertilization, where the single-celled zygote begins to divide into multiple cells.

2. These divisions result in smaller cells due to the cytoplasm being divided among them.

3. The cells that are formed during this process are called blastomeres.

4. As cleavage continues, the blastomeres compact together to form a structure called a morula.

5. Further divisions and rearrangements of blastomeres result in the formation of a hollow sphere of cells called a blastula.

6. The fluid-filled cavity that the blastomeres surround is called the blastocoel.

So, the correct answer is d) blastomeres.

Question

The cells which form during cleavage and surround the fluid filled cavity are called d) blastomeres.

Here's a step-by-step explanation:

1. Cleavage is the process in animal development after fertilization, where the single-celled zygote begins to divide into multiple cells.

2. These divisions result in smaller cells due to the cytoplasm being divided among them.

3. The cells that are formed during this process are called blastomeres.

4. As cleavage continues, the blastomeres compact together to form a structure called a morula.

5. Further divisions and rearrangements of blastomeres result in the formation of a hollow sphere of cells called a blastula.

6. The fluid-filled cavity that the blastomeres surround is called the blastocoel.

So, the correct answer is d) blastomeres.

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