Molecular data confirm that cnidarians branched off from the rest of animals before ________ evolved.
A. mollusks
B. bilateral symmetry
C. Porifera
D. arthropods
E. echinoderms
Answer: B
Biology & Microbiology
You might also like to view...
What would result if more than one sperm fertilized an egg?
A. hermaphroditism B. parthenogenesis C. polyploidy D. twins E. haploidy
Biology & Microbiology
In vertebrates, the central nervous system develops directly from the ____
a. somites b. neural plate c. notochord d. cells of the neural crest e. neural tube
Biology & Microbiology
When cancer cells have the ability to migrate to other parts of the body, they are said to be
A. benign. B. oncogenic. C. metastatic. D. genetic. E. invasive.
Biology & Microbiology
Growth areas of an angiosperm are called:
A) apical meristems. B) root caps. C) ground tissue. D) cuticles.
Biology & Microbiology