Mesozoic
What will be an ideal response?
birds first appeared during this era
mass extinction of dinosaurs and reptiles occurred during this era
placental mammals first appeared during this era
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The box numbered 2 represents which process?
A) cycling of energy
B) decomposers acting on all parts of the system
C) cycling of matter
D) gases in the atmosphere that can block sunlight
Xerostomia is the scientific name for "dry mouth." Dry mouth can be a medical concern because chronic dry mouth can lead to dental problems as well as problems tasting, chewing, and swallowing. Dry mouth is likely due to an inadequate production of
A) saliva. B) chyme. C) amylase. D) bile.
You are doing veterinary research on dog hormones. In your set of blood samples, you have one male dog with abnormally high levels of follicle-stimulating hormone and luteinizing hormone. What do you suspect may be the explanation for this outlier?
A. The dog had its pituitary gland removed. B. The dog had a hypothalamic problem causing low levels of gonadotropin-releasing hormone (GnRH). C. The dog was a female, not a male. D. The dog had been neutered.
Transcribe the DNA gene strand with the base sequence CCA - TAT - TCG into mRNA.
A. CCA - TAT - TCG B. CCA - UAU - UCG C. GGU - AUA - AGC D. GGT - ATA - AGC