How do VNTRs relate to DNA fingerprinting?
What will be an ideal response?
VNTRs are variable number tandem repeats of 15 to 100 base pairs long that vary among individuals. Because each non-twin individual has a different VNTR pattern, identity of individuals is unique.
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Which structures in the plant connect the cytoplasm of adjacent plant cells?
a. Lignin b. Extracellular matrix c. Cell membrane d. Cell wall e. Plasmodesmata
Peking man and Java man, which were discovered in Asia, are later examples of:
a. Australopithecus afarensis. b. Australopithecus africanus. c. Homo erectus. d. Homo sapiens. e. Homo habilis.
The second meiotic division of meiosis is important because
a. it returns the chromosome number to diploid before fertilization. b. it allows for crossing over and random distribution of chromosomes. c. it reduces cell size by dividing the cytoplasm in half. d. without this division, chromosome copies would double at each fertilization. e. fertilization requires this step.
Water potential is measured in units of pressure called _________.
A. Megapascals B. Milivolts C. Osmotic units D. Molarity E. Joules