A primary spermatocyte with 46 chromosomes will undergo meiosis and yield _____.
a. four spermatids with 23 chromosomes
b. two spermatids with 46 chromosomes
c. two spermatids with 23 chromosomes
d. four spermatids with 46 chromosomes
Ans: a. four spermatids with 23 chromosomes
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A scientist is studying several areas along an elevation gradient. Her study involves prescribed burns (purposefully set, low-intensity fires) in the different areas, followed by a comparison of the type and abundance of organisms that colonize them over the next ten years. What scale best describes her study?
A. Physiological ecology B. Ecosystem ecology C. Organismal ecology D. Community ecology E. Population ecology
The type of reproductive isolation in which the two populations are separated due to their habitat is
A. mechanical isolation. B. behavioral isolation. C. hybrid inviability. D. temporal isolation. E. ecological isolation.
One advantage to using NGS genome assembly over the Sanger method is that ________.
A. NGS involves inserting the genomic fragments into vectors, which is an efficient process compared to using the oligonucleotide adapters employed in the Sanger method B. NGS involves the construction of a genomic library, giving extra depth of coverage compared to the Sanger method C. NGS sequences the same fragment no more than 10 times, avoiding wasteful processes compared to the Sanger method D. NGS avoids the need to insert fragments into cloning vectors, using oligonucleotide adapters that bind to a solid surface instead
Sharks may detect their prey using all of the following except:a
olfaction. b. their lateral lines. c. electroreceptors. d. sight. e. hearing