Which procedure is the least-invasive method of assessing fetal health while development is still occurring?
A. amniocentesis
B. chorionic villus sampling
C. karyotyping
D. ultrasound
Answer: D
Biology & Microbiology
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All the cells in a cancerous tumor are ____________________ directly descended from one cell
Fill in the blank(s) with correct word
Biology & Microbiology
Part of a chromosome moves to another, nonhomologous chromosome during ____________________
Fill in the blank(s) with correct word
Biology & Microbiology
A change in the genetic makeup of a species over time is called
A) adaptation. B) mutation. C) evolution. D) natural causality.
Biology & Microbiology
The A159E mutation causes an A amino acid to be replaced with an E amino acid (their structures are shown here). What type of mutation is the A159E mutation?
A) missense mutation
B) silent mutation
C) frameshift mutation
D) nonsense mutation
Biology & Microbiology