Q. 8 - Biology

Question

Which of the following is not a true statement comparing exoskeletons and endoskeletons?  

1. Endoskeletons can support larger organisms.  
2. Only endoskeletons can grow as an organism grows. 
3. Exoskeletons provide greater protection of the internal organs.  
4. Exoskeletons provide less mechanical leverage.

Step-by-Step Solution

Answer

The correct answer is option (c).

Exoskeletons provide greater protection of the internal organs.  

Exoskeletons and Endoskeletons

• The exoskeleton, a hard protective layer that protects an organism's skin and facilitates movement through muscles attached on the inside, protects skin.
• An endoskeleton is an inner skeleton that supports muscles and permits movement. It is formed of hard, mineralized tissue. 
• The exoskeleton and endoskeleton help the body move and safeguard inner organs. 

Step: 1 Explanation for Correct answer

• An exoskeleton is a wearable external frame that supports the body.
• The exoskeleton not only promotes stability and movement but also provides a large surface area for muscle attachment.
• It shields the body from the environment outside. Thus, the option c is correct.

Step: 2 Explanation for incorrect answer

• Endoskeletons stabilize the body, safeguard internal organs, and permit movement by contracting muscles affixed to the skeleton. So, option a is wrong. 
• Bones are composed of living tissues, hence endoskeletons can develop inside the organism. So, option b is wrong as well. 
• The exoskeletons provide less mechanical leverage. Due to their weight and the unnatural movement of the suit, rigid exoskeletons can cause tension and exhaustion. Hence, option d is wrong too.