Describe at least 3 adaptations of deep-sea fishes for improving feeding efficiency
What will be an ideal response?
Many deep-sea fishes tend to be small and inactive. This characteristic alone means that these fishes will not consume large quantities of food because their metabolic rates are fairly low. When they do feed, many deep-sea fishes ensure that they capture and keep their prey by having very large teeth that angle back into their mouths to prevent escape. These fishes will not pass up a potential meal simply because it is too large. Rather, they have expandable jaws and mouths that allow them to take advantage of any food item they happen across. In addition, many deep-sea fishes increase the likelihood of coming across prey by employing attractive measures such as bioluminescent structures.
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During a DNA profiling analysis, short tandem
nucleotide repeats are first
a. subjected to high heat. b. inserted into a plasmid. c. chopped up using a restriction enzyme. d. placed on a gel for electrophoresis. e. amplified using PCR
Suppose that a DNA change results in the substitution of one codon for another, and the new codon specifies a different amino acid from the original. What type of mutation has occurred?
a. a chromosomal mutation b. a missense mutation c. a frameshift mutation d. a silent mutation
A growth-hormone releasing hormone tumor in the brain could lead to stunted growth in children.
Answer the following statement true (T) or false (F)
Products of photosynthesis The main product of photosynthesis used by plants is
a) glucose. b) oxygen. c) carbon dioxide. d) chlorophyll. e) sunlight.