Why are mountaintops colder than valley bottoms?
What will be an ideal response?
The atmosphere is thinner and retains less heat at higher elevations.
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The order of gene transfer in an Hfr × F- mating is best represented by
A. part of the chromosome followed by the plasmid followed by the rest of the chromosome. B. all plasmid genes followed by some or all of the chromosome. C. part of the plasmid followed by the chromosome followed by the rest of the plasmid. D. the chromosome followed by the plasmid.
In which of the following ways are archaeans similar
to eukaryotic cells? a. size b. shape c. histones d. DNA polymerases e. presence of operons
Marine cartilaginous fishes overcome water loss to their environments by:
a. having specialized chloride cells in their gills that prevent water loss. b. having specialized chloride cells in their gills that continuously excrete salts. c. storing urea in their body fluids, which causes them to be hypertonic to seawater. d. producing very small quantities of urine. e. drinking large quantities of freshwater
Autosomal recessive traits
a) occur in one-quarter of all offspring b) can skip generations c) are exhibited only in the offspring of two heterozygous parents d) occur more frequently in females than males e) all of the above answer choices are correct