Line 1: *TRH stimulates the pituitary gland to produce thyroid-stimulating hormone, or TSH. Another function of TSH is to maintain the structural integrity of the thyroid gland. TRH stimulates the pituitary gland to maintain structural integrity of the thyroid.*
*(A)*
Line 2: *What stimulates the pituitary gland in order to maintain structural integrity of the thyroid?
Options:
- (A) TRH
- (B) Urea
- (C) CO 2
- (D) PDAs
- (E) HPV
- (F) SO2
- (G) mL
- (H) p53*
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Line 1: *DNA is found in chromosomes. Chromosome Chromosome A chromosome is a grouping of coiled strands of DNA , containing many genes. DNA is found in coiled groups of genes.*
*(F)*
Line 2: *Dna is typically found in this state:
Options:
- (A) protected
- (B) spiky
- (C) dense
- (D) genetic
- (E) alleles
- (F) coiled
- (G) circular
- (H) electron*
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Line 1: *Organisms cluster around hydrothermal vents in the ocean floor. To survive, some organisms living near hydrothermal vents have formed close associations. Clusters form around hydrothermal vents to ensure survival.*
*(F)*
Line 2: *How is survival ensured around hydrothermal vents?
Options:
- (A) heat produced
- (B) Eating a lot
- (C) Reproducing quickly
- (D) biological diversity
- (E) vegetation
- (F) Being in a cluster
- (G) Staying far apart
- (H) hydrate their cells*
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Line 1: *Echinoderms lack a centralized nervous system. From animal experiments, it seems to be a central nervous system toxin. Echinoderms are resistant to some toxins.*
*(F)*
Line 2:
*Echinoderms are resistant to some:
Options:
- (A) starfish
- (B) enzymes
- (C) Toxicity
- (D) pesticide
- (E) parasites
- (F) toxins
- (G) boats
- (H) chemicals*
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