Which of the following is the correct sequence of events during pre-embryonic development?
A) zygote ? blastocyst ? morula ? implantation B) zygote ? morula ? blastocyst ? implantation
C) implantation ? zygote ? morula ? blastocyst D) morula ? zygote ? implantation ? blastocyst
Answer: B
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Gram-positive cocci in clusters were reported on preliminary direct Gram staining from a sputum specimen. The patient was treated with antibiotics. Following 48 hours of treatment, a secondary specimen was reported as gram-positive rods. The discrepancy in this result is:
a. the patient likely obtained a secondary infection following treatment of the first pathogen. b. the antibiotics are effective and the gram-positive cocci are distorted due to inhibition of growth by the antibiotic. c. the first preliminary Gram stain was erro-neous, and should have been reported as normal microbiota. d. there is no discrepancy.
Which statement does not apply to carbon dioxide?
a. It is released in the burning of fossil fuels. b. It contributes to ozone destruction. c. It is absorbed by plants. d. It contributes to global warming. e. It is increasing in abundance in the atmosphere.
If you are cast up on a desert island with no fresh
water to drink, the level of which of the following will rise in your bloodstream in an effort to conserve water? a. erythropoietin b. oxytocin c. insulin d. antidiuretic hormone e. glucose
Migration is an innate behavior among whooping cranes
Indicate whether the statement is true or false