All matter on earth, both living and non-living, is made up of:
A) cells.
B) DNA.
C) carbohydrates.
D) phospholipids.
E) atoms.
E) atoms.
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Nondisjunction can occur at either the first or second division of meiosis. XYY individuals would most likely arise from nondisjunction at the ________ meiotic division in the ________.
A) first; mother B) second; mother C) first; father D) second; father E) More than one of the choices could give rise to XYY individuals.
Usually, the first procedure a genetic counselor performs for a client is
A. amniocentesis or CVS. B. taking a karyotype. C. biochemical testing. D. constructing a pedigree. E. ultrasonic imaging.
Which tissue system of the plant body is largely responsible for photosynthesis?
a. ground tissue system
b. vascular tissue system c. dermal tissue system d. primary tissue system e. secondary tissue system
Early in embryonic development, all vertebrate embryos have some similarities in their appearance
Indicate whether the statement is true or false