The structures in the outermost ring of floral structures that cover and protect the bud are
A. receptacles.
B. sepals.
C. stamens.
D. carpels.
E. petals.
Answer: B
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Mycoplasmas are organisms without cell walls. Which antimicrobial agents would be ineffective in treating infections involving this bacterium?
a. Tetracycline b. Aminoglycosides c. Penicillin d. Rifampin
Electroreceptors ____
a. are only used by fishes for navigational purposes b. can be used for communication between primates c. are only able to receive, not produce, electrical signals d. can be used to generate electrical fields in some invertebrates having special electric organs e. are usually used in communication, navigation, and hunting in the organisms that possess them
What type of organism is in this picture?
1.bivalves
2.barnacles
3.plankton
4.sea cucumber
What makes up the female reproductive whorl of a flower?
a. the carpels b. the receptacles c. the stamens d. the petals