Which of the following items relate specifically to purines? Select all that apply.A) nucleotides with a single ringB) adenineC) cytosineD) nucleotides with a double ringE) guanine
What will be an ideal response?
B, D, E
Adenine and guanine are purines. Purines are nucleotides with a double ring structure.
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You may have heard that monarch butterflies (and their caterpillars) are "poisonous" to many predators. What makes these insects so toxic?
A. Monarch caterpillars produce cardenolides in their digestive tracts. B. Monarch caterpillars use cardenolides from milkweed to synthesize toxins. C. Monarch caterpillars ingest milkweed latex which "chokes" their predators. D. Monarch caterpillars store cardenolides from milkweeds. E. Monarch caterpillars secrete latex from their bodies.
Exchange of genetic material among different species is called
A. homolgous gene exchange. B. horizontal gene transfer. C. exon shuffling. D. genetic recombination. E. exon shuffling and or genetic recombination.
Which of the following is a type of gland that
lacks ducts?
a. endocrine b. muscular c. nervous d. exocrine e. connective
Spontaneous generation is the belief that
What will be an ideal response?