Question

Students at ASU are studying the rate of mitosis in various organisms. The students measured the duration of each step of mitosis in a mouse

spleen, a grasshopper neuroblast, an onion root tip, and a pea root tip. Below is a table of their data:
Table 7.2.
Durations of different stages of mitosis in four
different materials.
Duration in minutes
Material
Pro- Meta- Ana- Telo.
phase phase phase phase
1. Mouse (spleen)
2. Grasshopper (neuroblasts)
3. Onion (root tip)
4. Pea (root tip)
21
102
71
78
13
13
6.5
14.4
5
9
2.4
4.2
4
57
3.8
13.2
Which of the following statements accurately describes their data?
O a
Ob
All organisms go through mitosis at the same rate regardless of genetic and environmental factors.
The pea root tip goes through the phases of mitosis slower than all of the other organisms.
The onion root tip and the pea root tip have the same rate of mitosis.
The mouse spleen goes through the phases of mitosis faster than the onion root tip.
Ос
Od

Answer 1

The mouse spleen goes through the phases of mitosis faster than the onion

root tip.

What is Mitosis?

Mitosis is a type of cell division which is responsible for growth and

replacement of worn out tissues. It is divided into phases which include:

• Prophase

• Metaphase

• Anaphase

• Telophase

The most appropriate choice is therefore mouse spleen going through the

phases faster as it takes a lesser time when all the minutes in the phases are

combined together.

Read more about Mitosis here