In the waiting room of a doctor's office, the staff are creating an educational display about varieties of birth control. What general categories of birth control will they want to outline?
_____ drugs that block gonad development
_____ devices to prevent implantation
_____ hormones to close cervix
_____ hormones to prevent ovulation
_____ hypothalamic implants
_____ nasal spray for males
_____ sperm barrier
_____ sperm destruction
_____ surgical sterilization
_____ abstinence
_____ drugs that block gonad development
__X__ devices to prevent implantation
_____ hormones to close cervix
__X__ hormones to prevent ovulation
_____ hypothalamic implants
_____ nasal spray for males
__X__ sperm barrier
__X__ sperm destruction
__X__ surgical sterilization
__X__ abstinence
The categories of contraceptive techniques include: sperm barriers, sperm destruction, hormones that prevent ovulation, devices or hormones that prevent implantation, or surgical sterilization.
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Which of the following general transcription factor phosphorylates the C-terminal domain of RNA Pol II?
A. TFIID B. TFIIA C. TFIIH D. TFIIF
The ribosomes
A. move along the tRNA in a 3'-5' direction. B. move along the mRNA in a 5'-3' direction. C. move along the DNA in a 5'-3' direction. D. provide a platform that brings the amino acids into a favorable position for joining. E. move along the mRNA in a 5'-3' direction AND provide a platform that brings the amino acids into a favorable position for joining.
This tissue gives pear flesh a gritty texture and makes seed coats hard:
a. xylem b. collenchyma c. phloem d. sclerenchyma e. parenchyma
Rhizomes, tubers, corms, and stolons are examples of modified:a
leaves. b. flowers. c. roots. d. bulbs. e. stems.