Which of the following is not an adaptation for flight in marine birds:
1.ectothermic
2.high metabolic rate
3.advanced respiratory system
4.keen senses
1
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The cartilaginous organ between the pharynx and the trachea, which contains the vocal cords in humans is called the ________.
Fill in the blank(s) with the appropriate word(s).
A DNA microarray is ____
a. used for gel electrophoresis b. used identifying fragments of genes using a labeled probe c. linked to self-replicating vectors to create recombinant DNA molecules d. a series of long mRNA sequences placed on a solid support and has several uses e. a series of short nucleotide sequences placed on a solid support and has several uses
What two bases in the DNA molecule are double-ringed?
A) Guanine and cytosine B) Thymine and cytosine C) Uracil and guanine D) Guanine and adenine E) Thymine and uracil
A scientist performs a controlled experiment. This means that
A) the experiment is repeated many times to ensure that the results are accurate. B) the experiment proceeds at a slow pace to guarantee that the scientist can carefully observe all reactions and process all experimental data. C) two versions of the experiment are conducted, one differing from the other by only a single variable. D) one experiment is performed, but the scientist controls the variables.