Question

directions:

1. color and label the tailbone (coccyx) in the diagram of the pelvis bone below.
2. fill in the blanks using the terms below.

• coccyx - vestigial - ancestor - tail

cut out page along the dotted line below
vestigial structures
diagram of human pelvis
color in and label the tailbone on this human pelvis!
sometimes species have structures that have no apparent function. these are called __________ structures. humans have many vestigial structures, such as the tailbone or “______”. the presence of vestigial structures indicates evolution from an ________ that did have a use for the structure - in this case, our ancestor had a functional ____.

Explanation:

1. Vestigial structures are defined as body parts with no clear current function, which matches the first blank's description.
2. The human tailbone's anatomical name is the coccyx, so this fills the second blank.
3. Vestigial structures are evidence of evolution from earlier life forms; the term provided for this is ancestor, fitting the third blank.
4. The human coccyx is a remnant of a fully functional tail that our evolutionary ancestors possessed, so "Tail" fills the final blank.

For the diagram: The coccyx is the small, pointed bone at the very bottom of the pelvis structure shown.

Answer:

1. (Diagram task): Color and label the small, pointed bone at the bottom of the pelvis as Coccyx (tailbone)
2. Fill-in-the-blanks answers (in order of the blanks):

• Vestigial
• Coccyx
• Ancestor
• Tail