Question

1. a diagram shows a cell in prophase, which of the following describe what would happen in the next stage?

a. nuclear envelope appears, chromosomes uncoil
b. cell membrane pinches inward; centrioles disappear
c. spindle fibers pull chromosomes apart; chromosomes condense
d. chromosomes line up at center of cell; spindle fibers attach to centromeres
keyword(s) in question:
eliminate 2 answer choices and explain why it is incorrect.
1.
2.

Explanation:

• Option a: Nuclear envelope appears and chromosomes uncoil occur in telophase, not the stage after prophase (metaphase).
• Option b: Cell membrane pinching inward (cytokinesis) and centrioles disappearing (not a typical event in the immediate stage after prophase) are not characteristics of metaphase.
• Option c: Spindle fibers pull chromosomes apart occurs in anaphase, and chromosomes condense is a prophase event.
• Option d: In metaphase (the stage after prophase), chromosomes line up at the center of the cell (metaphase plate) and spindle fibers attach to centromeres.

Answer:

1. Eliminate option a: Nuclear envelope appears and chromosomes uncoil are telophase events.
2. Eliminate option b: Cell - membrane pinching (cytokinesis) and centrioles disappearing (not relevant to metaphase) are incorrect for the stage after prophase.