You encounter an animal that is heterotrophic, dependent on light for survival, possesses true tissues, and is diploblastic. You would also expect this organism to also have:
a. Zooxanthellaea
b. Nematocysts
c. Radial symmetry
d. B and C
e. all of the above
Answer: e. all of the above
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Reactive oxygen intermediates and reactive nitrogen intermediates produced by phagocytic cells are effective in killing invading microorganisms.
Answer the following statement true (T) or false (F)
Mutations in the lacI and lacO genes of the lac regulatory system in E. coli often lead to full transcription of the three structural genes, even when no lactose is available to the organism. Such mutations would be called ________
Fill in the blank(s) with correct word
Which of the following describes the most important difference between invertebrates and vertebrates?
a) invertebrates contain multiple tissues, while vertebrates do not b) vertebrates contain a backbone, while invertebrates do not c) invertebrates contain a backbone, while vertebrates do not d) vertebrates contain multiple tissues, while invertebrates do not
Parasitic and scavenger fish
A) sharks and rays B) lamprey and hagfish C) bony fish D) coelacanths