Triploblastic are animals that
A. form three separate blastulas from a single embryo.
B. produce three eggs, each of which forms a single blastula.
C. form three blastopores in each blastula.
D. have a blastula composed of three cells.
E. have three germ layers.
E. have three germ layers.
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A fish detects vibrations in the water by means of its ____, which contains numerous ____.
A. lateral line, hair cells B. ear, statocysts C. swim bladder, stretch receptors D. skin, mechanoreceptors E. lateral line, thermoreceptors
The DNA codon AGT codes for an amino acid carried by a tRNA with the anticodon ________
A) TCU B) AGU C) TCA D) AGT
The Etr1 gene product in plants is a receptor for the gas ______, a plant hormone that regulates a diverse array of developmental processes, like seed germination, _____ and ______.
a) ethylene, flowering, stem growth b) ethylene, flowering, fruit ripening c) methylene, flowering, fruit ripening d) ethanol, flowering, fruit ripening
Low contrast specimens are made easier to see by
A) increasing the amount of light passing through the slide. B) using dyes that react with their structures. C) adding color filters to the microscope. D) using smaller aperture lenses. E) drying them in a vacuum.