Which of the following statements is false?
A. After entering the uterus, sperm must pass
through the cervix in order to enter the
fallopian tubes.
B. During ovulation the oocyte is expelled
from the ovary and enters the fallopian tubes.
C. The oocyte is the largest cell by volume in
the human body.
D. Some types of cervical mucus block the
passage of sperm, whereas other types guide
sperm.
E. If an oocyte is not fertilized then it is
removed from the body through menstruation.
A
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In the 1980s, when researchers began seeking gene variants that caused or contributed to bipolar disorder, it seemed that each extended family had its own mutations. These findings, looking back, most likely mean that
A) bipolar disorder results from imitating the behavior of an affected family member. B) many gene variant combinations cause or contribute to bipolar disorder, but only a few such variants are seen in any one family. C) many people fake the symptoms of bipolar disorder. D) bipolar disorder reflects changes in gene expression, but not in mutations.
Each strand of the DNA molecule serves what function during DNA replication?
a. source of amino acids b. source of bases c. enzymatic function d. DNA unwinding e. DNA template
Calvin cycle (Dark reaction) takes place in
A) thylakoid B) cytoplasm C) stroma D) mitochondria
Sequencing DNA from different organisms has been a breakthrough for phylogenetics because:
a. we can now build heat-tolerant animals. b. we now have a method to determine the relatedness of organisms that leave no fossils. c. it has reduced the impact of antibiotic resistance in bacteria. d. we can now recreate genomes from the past. e. All of the above are correct.