Plants Grow Taller Through Mitosis at the Tips of Their

question 23

Multiple Choice

Plants grow taller through mitosis at the tips of their shoots (above ground) and at the tips of their roots (below ground) . Here are two samples of tissue taken from a grass plant, one from the tip of the root and one from the mid part of the plant.
$\begin{array} { | l | l | l | } \hline \text { Stage } & \text { Sample 1 } & \text { Sample 2 } \\\hline \text { Interphase } & 74 \% & 98 \% \\\hline \text { Prophase } & 18 \% & 0.5 \\\hline \text { Metaphase } & 4 \% & 0.2 \% \\\hline \text { Anaphase } & 2 \% & 0.1 \% \\\hline \text { Telophase } & 1 \% & 0.1 \% \\\hline\end{array}$
-From the data shown what can you conclude about the amount of time these plant cells spend in various stages of the cell cycle?

• A) Cells spend more time in cytokinesis than in synthesizing new DNA during chromosomal duplication.
• B) Metaphase is the longest stage of mitosis.
• C) Metaphase lasts about twice as long as anaphase
• D) Cells spend less time in prophase than any other of the stages of mitosis.

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Definitions:

Back

To return to a previous position or condition, or the posterior part of the human body.

Chest

refers to the front surface of the body enclosed by the ribs, extending from the neck to the abdomen and housing organs such as the heart and lungs.

Ablation

Removal of cells or tissues, often through surgical means.

Cortex Removed

Describes a condition or experimental scenario where the outer layer of the cerebrum (cortex) is surgically removed or absent.