In which part of a sponge's body does fertilization occur?
A. the spongin.
B. the spicule.
C. the ostium.
D. the mesohyl.
E. the amoebocyte.
Answer: D
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Some methanogenic Archaea are capable of fixing nitrogen.
Answer the following statement true (T) or false (F)
A truck driver is transporting a load of unripened bananas in an air-tight vehicle, and decides to stop and eat an apple
He also checks on his cargo, opening the back of his truck and walking around the unripened bananasâ€"all while still snacking on his apple. When he makes his final delivery, he opens the back of his truck to find that all of his bananas have ripened. Why? Select all correct choices. A. Opening the back of the truck exposed the bananas to oxygen. B. Exposure of the bananas to the apple (and its ethylene) instigated their ripening. C. The bananas would naturally ripen over time, even in an air-tight environment. D. Opening the back of the truck exposed the bananas to light of red wavelengths.
________ attractions are the only ones that all molecules have regardless of what they are composed of.
A. Hydrogen bonding B. Ion-ion interactions C. London dispersion forces D. Dipole-dipole attractions
A two-year-old child presents to a pediatric practice with a barking cough and loud wheezing. The parent is alarmed and insists on antibiotics. What is the likely diagnosis, and are antibiotics appropriate?
A) croup / no, most cases are viral B) sinusitis / no, most cases are due to viral infections or irritants C) allergies / no, allergies are caused by irritants and are not infections D) pneumonia / yes, this can be a life-threatening condition and is often bacterial E) epiglottitis / yes, this is a life-threatening bacterial infection