Why doesn't a flatworm have a circulatory system?
A) The animal is flat enough to permit effective gas exchange by diffusion.
B) There is not enough room for a circulatory system.
C) The animal lacks muscles, so it could not have a heart to pump blood.
D) Only bilaterally symmetrical animals need a circulatory system.
E) Only vertebrates have circulatory systems.
Correct Answer:
Verified
Q2: In which animals would diffusion alone not
Q3: What is one difference between the erythrocytes
Q4: Figure 44-2 Q5: Figure 44-2 Q6: A vertebrate's circulatory system would include: Q7: Figure 44-2 Q8: Which of the following are agranular leukocytes? Unlock this Answer For Free Now! View this answer and more for free by performing one of the following actions Scan the QR code to install the App and get 2 free unlocks Unlock quizzes for free by uploading documents
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