What is a DNA library?
A. A collection of vectors, each containing a fragment of the original genome
B. A complete sequence of the genetic material in an organism
C. An electronic file that may be used for additional genetic analysis
D. A collection of mRNA from a given cell
A
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A blastomere is a ________ and a blastocyst is ________.
A) fetal organ produced by cleavage; an embryonic organ produced by cleavage B) fetal membrane; an embryonic membrane C) cell produced by cleavage; a hollow ball of cells D) solid ball of cells; three-layered embryo
A(n) ________ is a type of community with relatively consistent species composition; a uniform, general appearance; and a distribution that is characteristic of a particular habitat
Fill in the blank(s) with correct word
Why would a scientist trying to isolate osteoblasts look between the periosteum and the bone in a young animal to find them?
What will be an ideal response?
What situation relates to the reason why hot-air balloons are able to fly?
A) Precipitation falls on the leeward side of a mountain. B) Water droplets can freeze inside clouds. C) Very little rain falls at 30° north and south of the equator. D) The tops of hills are warmer than the valleys below.