Which if the following is not a source of genetic variation in meiosis?
A) law of independent assortment
B) tetrad formation
C) crossing over
D) the random lining up of chromosomes on the metaphase plate
E) polar body formation
Answer: E
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The molluscan body plan is based on three major components: the foot, the visceral mass, and the _______.
A. jointed limbs B. shell C. mantle D. gills
A balance between which two ions in aqueous solutions within organisms is critical for the proper functioning of the chemical processes of life?
A) H+ and OH? B) Na+ and Cl? C) Na+ and OH? D) H+ and Cl? E) H+ and H?
Which of the following would have the largest number of hydrogen ions (H+)?
A. A solution with the pH 11 B. A solution with the pH 8 C. A container of acetic acid (vinegar) D. A container of a strong base
In meiosis, homologous chromosomes separate in ____
a. metaphase I b. anaphase I c. metaphase II d. anaphase II e. telophase