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At a number of places the nuclear envelo...

At a number of places the nuclear envelope is interrupted by minute (A)____ which are formed by the (B)_____ of its two membranes.

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To answer the question, we need to fill in the blanks based on our understanding of the nuclear envelope and its structure. **Step-by-Step Solution:** 1. **Understanding the Nuclear Envelope**: The nuclear envelope is a double membrane structure that surrounds the nucleus of a cell. It separates the contents of the nucleus from the cytoplasm. 2. **Identifying the Structure**: The nuclear envelope consists of two membranes: an outer membrane and an inner membrane. Between these two membranes is a space known as the perinuclear space. 3. **Finding the Pores**: At certain points, the inner and outer membranes of the nuclear envelope fuse together. This fusion creates openings known as nuclear pores. 4. **Filling in the Blanks**: - For blank (A), we can fill in "pores" since the nuclear envelope is interrupted by minute pores. - For blank (B), we can fill in "fusion" because these pores are formed by the fusion of the two membranes. **Final Answer**: At a number of places, the nuclear envelope is interrupted by minute (A) **pores** which are formed by the (B) **fusion** of its two membranes. ---
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