Which statement about the specific immune response is FALSE? Each T or B cell has antigen receptors for only one specific antigen.

T and B cells recognize antigens by using antibodies bound to their surface membranes.

Unique antigen receptors are created by genetic recombination.

Antigens must be presented by an MHC molecule for T and B cells to recognize them.

All cells express MHC-I molecules, but only antigen-presenting cells express MHC-II molecules.

1. Interphase -  DNA replicates, RNA leaves the nucleus

2. Prophase - Crossing over occurs during this phase, DNA condenses into chromosomes

3. Metaphase - Chromosomes align along the middle of the cell

4. Anaphase - The centromeres split and the chromatids are pulled apart

5. Telophase - Nuclear membrane re-forms

6. Cytokinesis - The cell splits into two daughter cells.

7. Haploid - Occurs when only one member of each homologous pair of chromosomes is present

8. Metaphase II - Chromosomes align in the middle of the meiosis II cell

9. Anaphase II - Chromatids separate in a meiosis II cell

10. Telophase II - Four daughter cells form, each with one copy of the original chromosomes.

Explanation:

1. Interphase -  DNA replicates, RNA leaves the nucleus

2. Prophase - Crossing over occurs during this phase, DNA condenses into chromosomes

3. Metaphase - Chromosomes align along the middle of the cell

4. Anaphase - The centromeres split and the chromatids are pulled apart

5. Telophase - Nuclear membrane re-forms

6. Cytokinesis - The cell splits into two daughter cells.

7. Haploid - Occurs when only one member of each homologous pair of chromosomes is present

8. Metaphase II - Chromosomes align in the middle of the meiosis II cell

9. Anaphase II - Chromatids separate in a meiosis II cell

10. Telophase II - Four daughter cells form, each with one copy of the original chromosomes.