A previously unknown animal is being studied so that it can be classified. It is an invertebrate, triploblastic, dorsoventrally flattened, acoelomate, and has flame cells. Which phylum would you place it in?
A. Platyhelminthes.
B. Mollusca.
C. Arthropoda.
D. Cnidaria.
A. Platyhelminthes.
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Rank these plant types from those that undergo senescence soonest after seed germination to those that live longest.
Ranking Questions __ herbaceous perennial __ biennial __ annual __ woody perennial
What are the most common deficiency symptoms and what process is mostly affected?
What will be an ideal response?
Name two forms of recombination in bacteria
A) conjugation and transduction B) insertion and replication C) auxotrophic and prototrophic D) mixed and generalized E) lytic and lysogenic
How does ultraviolet radiation in sunlight typically damage DNA?
A. It breaks hydrogen bonds between the two strands of DNA. B. It converts cytosine into uracil. C. It causes two adjacent pyrimidine bases to become covalently linked. D. It removes bases from nucleotides in DNA. E. It breaks the sugar-phosphate backbone of DNA.