26. Whales are tetrapods—but living whales do not have four limbs. What is a more accurate way to describe tetrapods? (highlight your answer)
a. Animals that have at least two limbs
b. Animals that descended from a four-limbed ancestor
C. Animals that have four limbs at some point in their lives
d. Animals that evolved the ability to survive without limbs

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.