Q. 14 - Biology

Question

While assembling a skeleton of a new species, a scientist points to one of the bones and observes that it looks like the most likely site of leg muscle attachment. What kind of bone did she indicate? 

1. sesamoid bone  
2. long bone 
3. trabecular bone  
4. flat bone 

Step-by-Step Solution

Answer

The correct answer is option (d).

While assembling the skeleton of a new organism, a scientist points to one of the bones and notices that it is where the leg muscles attach. She mentions the flat bone in it. 

Flat bones

• A layer of spongy bone is between two delicate layers of compact bone to form flat bones. 
• Although flat bones have marrow, they lack a cavity for the bone marrow.
• In general, the flat bones aid in body movement, blood cell generation, and protection.

Step: 1 Explanation for Correct answer

• A scientist is building the skeleton of a new organism when he realizes that the leg muscles join to one of the bones. 
• The flat bone in it is mentioned by her because The coxal bone, which is made up of the three huge flat bones ilium, ischium, and pubis, is a component of the pelvis. 
• These bones serve to safeguard a number of organs and connect the leg to the hip. Thus, the option d is correct. 

Step: 2 Explanation for incorrect answer

• The largest and most well-known sesamoid bone is the patella, and it can be found in the foot, hand, and wrist. So, option a is wrong.
• The majority of the long bones are found in the appendicular skeleton. So, option b is wrong as well.
• At the epiphyses of long bones and in the vertebral bodies, trabecular bone can be discovered. Hence, option c is wrong too.