Which hormone, secreted by the embryo, is tested for in all pregnancy tests?
A. human chorionic gonadotropin
B. follicle-stimulating hormone
C. luteinizing hormone
D. progesterone
E. estrogen
Answer: A
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Imagine that you compare two DNA sequences found in the same location on homologous chromosomes. On one of the homologs, the sequence is AACTACGA. On the other homolog, the sequence is AACTTCGA
Within a population, you discover that each of these sequences is common. These sequences _____. A) contain an SNP that may be useful for genetic mapping B) identify a protein-coding region of a gene C) cause disease D) protect against disease E) do none of the listed actions
Regression toward the mean is observed because, during meiosis, independent assortment, ____ , and ____ break up combinations of genes that result in ____
Fill in the blank with the appropriate word.
At time one, 50 butterflies were captured and were marked with paint. Two days later, 100 were captured and 10 had been previously marked. What is the estimated population size?
a. 100 b. 500 c. 1000 d. 5000 e. 10,000
Which of the following is the best definition of "microbial antagonism"?
A. the presence of pathogens on the surface of the skin, which will invade the body through abrasions B. the presence of normal microbiota that protect the body by competing with pathogens in a variety of ways to prevent pathogens from invading the body C. the presence of normal microbiota that can become pathogens under certain conditions D. the ability of microbiota to mutate into pathogens E. the presence of resident bacteria on the surface of the body and in cavities that connect to the surface