A difference between a morula and a blastula is that the:
A) blastula has fewer cells than the morula.
B) morula is a solid ball of tightly packed cells, whereas the blastula has a cavity in the center.
C) morula is a well-developed embryo, and the blastula is an earlier stage of development.
D) morula has a hollow center, but the blastula doesn't.
Answer: B
You might also like to view...
Which of the following is NOT true of
homeotic genes?
a. they control the development of body parts b. they are highly conserved genes c. they are specific to specific species d. PAX6 is an example of one e. they have been discovered by knockout experiments
Muscles are in antagonistic sets because
A. muscles cannot lengthen by themselves. B. muscles push but cannot pull. C. they do not like one another. D. there is an increase in metabolic efficiency if they are present in antagonistic sets.
These act as rivets anchoring adjacent cells together at spots throughout the cell.
A. desmosomes B. fibronectin C. hemidesmosomes D. adherens junctions E. focal adhesions
The most oxygenated blood is indicated by the letter ____
a. A b. B c. C d. D e. E