Molecules of _ bring the building blocks of protein to the ribosomes in the correct sequence.
Options:
- (A) form
- (B) fusion
- (C) core
- (D) shape
- (E) sugar
- (F) HIV
- (G) tRNA
- (H) small
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Let's think first: Molecules of tRNA bring amino acids to the ribosome in the correct sequence. Amino Acids Amino acids are the building blocks of proteins. Molecules of tRNA bring the building blocks of proteins to the ribosome in the correct sequence.... So the answer is [(G)]

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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Let's think first: 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.... So the answer is [(A)]

Which species doesn't have an anterior or posterior end?
Options:
- (A) animals
- (B) peachleaf willow
- (C) Rabbits
- (D) Blowfish
- (E) fur seals
- (F) Snakes
- (G) Echinoderms
- (H) alpacas
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Let's think first: Adult echinoderms have radial symmetry. Animals with radial symmetry lack an anterior and posterior end. Adult echinoderms lack an anterior and posterior end.... So the answer is [(G)]

The gene pool expands through fertilization and:
Options:
- (A) offspring
- (B) agriculture
- (C) mutation
- (D) babies
- (E) seeds
- (F) zygotes
- (G) relocation
- (H) competition
--
Let's think first: Mutation creates new genetic variation in a gene pool. Fertilization increases genetic variation. Mutation and fertilization have similar effects on the gene pool.... So the answer is [(C)]

Playing is one way organisms that have ingestive metabolism learn how to what?
Options:
- (A) propagate
- (B) instinct
- (C) grow
- (D) nutrients
- (E) die
- (F) behave
- (G) survive
- (H) Grow well
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Let's think first: Playing is one way mammals and other animals learn how to behave. Animals are organisms that have ingestive metabolism. Playing is one way organisms that have ingestive metabolism learn how to behave.... So the answer is [(F)]

What is found in chromosomes?
Options:
- (A) Chemical energy
- (B) It helps them survive
- (C) deoxyribonucleic acid
- (D) toxic acids
- (E) more abundant
- (F) allow growth
- (G) internucleic acid
- (H) chromosomal filters
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Let's think first: DNA is found in chromosomes. DNA DNA is deoxyribonucleic acid. Deoxyribonucleic acid is found in chromosomes.... So the answer is [(C)]