The sex hormones estrogen, progesterone, and testosterone belong to which class of molecules?
A. proteins
B. amino acids
C. lipids
D. carbohydrates
E. nucleic acids
Ans: C. lipids
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If a pitcher plant is grown in an insect-free environment, what would you expect to happen?
a. No changes will occur. b. The plant will limit its growth. c. The plant will produce more nectar. d. The plant will instantly die.
The hormone that promotes conservation of water in the human endocrine system is the
A. antidiuretic hormone (ADH). B. prolactin. C. oxytocin. D. luteinizing hormone (LH). E. thyroid-stimulating hormone (TSH).
Which organ is part of more than one organ system?
a. stomach b. liver c. pancreas d. intestine e. brain
A(n) (genome/codon/operon) is a set of prokaryotic genes that are regulated and transcribed as a unit
What will be an ideal response?