StemCET Logo

Botany Question 6 – AP-EAMCET 2025

← Back
Three plants, Mustard, Calotropis and Guava, are collected. There are 30 nodes in Mustard, 30 nodes in Calotropis, 25 nodes in Guava are present. Find the number of leaves put together in all three plants ?

Understand the definition of a 'node' in plants and its relation to leaf attachment.

Step 1: Identify the number of leaves per node for each plant✦ Active

In botany, a node is the point on a stem where a leaf or branch is attached. The number of leaves per node depends on the plant's phyllotaxy (arrangement of leaves on a stem).

For the given plants:

1. Mustard (Brassica juncea) typically exhibits alternate phyllotaxy, meaning 1 leaf per node.

2. Calotropis (Calotropis procera) typically exhibits opposite decussate phyllotaxy, meaning 2 leaves per node.

3. Guava (Psidium guajava) typically exhibits opposite phyllotaxy, meaning 2 leaves per node.

💡 Teacher's Secret Hint

This question requires specific botanical knowledge about the phyllotaxy of the mentioned plants. Assuming one leaf per node for all plants would lead to an incorrect answer.

Step 2: Calculate the total number of leaves for each plant○ Expand

Using the number of nodes provided and the leaves per node identified in Step 1, calculate the total leaves for each plant:

1. For Mustard: 30 nodes×1 leaf/node=30 leaves

2. For Calotropis: 30 nodes×2 leaves/node=60 leaves

3. For Guava: 25 nodes×2 leaves/node=50 leaves

Step 3: Sum the leaves from all three plants○ Expand

To find the total number of leaves put together in all three plants, sum the individual leaf counts:

Total leaves=Leaves from Mustard+Leaves from Calotropis+Leaves from Guava
Total leaves=30+60+50=140 leaves
💡 Teacher's Secret Hint

Double-check your addition to avoid simple arithmetic errors.

✦ STEM Console utilizes AI models to generate step-by-step explanations and math clues. AI can make mistakes.