Describe the degree of segmentation in lancelets. Choose two answers.Multiple select question.specialized limbs are presentsome branching from dorsal tubular nerve cordsegmentally arranged muscles

1. Segmentally arranged muscles: Lancelets, also known as amphioxus, exhibit a high degree of segmentation, particularly in their musculature. Their body is divided into a series of identical segments known as myomeres. Each myomere is a block of muscle tissue, and they are arranged sequentially along the length of the body, allowing for coordinated movement.

2. Some branching from dorsal tubular nerve cord: The nervous system of lancelets is also somewhat segmented. The dorsal tubular nerve cord, which is the equivalent of our spinal cord, runs the length of the body. In each body segment, branches from this nerve cord innervate the corresponding myomere, providing a degree of nervous system segmentation.

However, it's important to note that lancelets do not have specialized limbs and their segmentation is not as complex as in some other organisms.

1. Segmentally arranged muscles: Lancelets, also known as amphioxus, are simple, fish-like organisms that are characterized by their segmented muscle blocks known as myomeres. These myomeres run along the length of the body, providing the primary means of locomotion. This is a clear indication of segmentation in lancelets.

2. Some branching from dorsal tubular nerve cord: The dorsal tubular nerve cord in lancelets is a hollow structure that runs along the length of the body. It does branch out to innervate the segmentally arranged muscles, providing another example of segmentation in these organisms.

Note: Lancelets do not have specialized limbs, so this option is not correct.