Genetic analysis indicates that an unknown organism contains a gene that codes for a defective form of telomerase. Based on this information alone, you can conclude that this organism
A. is eukaryotic.
B. is prokaryotic.
C. has unusually long telomeres.
D. has an increased risk of developing cancer.
Answer: A
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In electron transport systems, the electron carriers are membrane associated
Indicate whether the statement is true or false.
Capillary walls consist only of
A. a single layer of epithelial cells covered by connective tissue. B. connective tissue. C. a single layer of endothelial cells. D. smooth muscle. E. a single layer of epithelial cells covered by smooth muscle.
Which birth control method does NOT suppress ovulation?
a. emergency contraception pills b. birth control pill c. Progestin implants d. tubal ligation e. progesterone patches
Which of the following is TRUE regarding lymph nodes?
A) They are located only in the digestive tract and neck. B) They remove microorganisms and abnormal cells from the lymph and return them to blood circulation. C) Macrophages but not lymphocytes can be found within lymph nodes. D) They filter lymph fluid, trapping microorganisms and abnormal cells. E) Lymph flows from the lymph vessels to the urinary system.