In mammals such as humans, the chorion and the allantois fuse to form the ____ , an organ that allows the embryo to obtain nutrients directly from the mother
Fill in the blank with the appropriate word.
placenta
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Which of the following is true regarding RFLPs?
A. A polymorphism results in one site being recognized by a restriction enzyme, but not in others. B. They are the only way to distinguish between identical twins. C. They are only seen with chromosomal mutations. D. They are constructed as a way to insert genes into plasmids. E. None of the answer options is correct.
The most common causative agent in fungal sinusitis is ________.
A. Streptococcus pneumoniae B. Corynebacterium diphtheriae C. Candida albicans D. Haemophilus influenzae E. Aspergillus fumigatus
In the Hardy-Weinberg equation p + q = 1, p and q represent the allele frequency in a population of diploid organisms if
A. the trait is polygenic. B. only two alleles exist for that gene. C. two or more alleles exist for that gene. D. two or more genes are needed to express a trait. E. only one allele exists for that gene.
Which of the following has high compliance, allowing it to hold a large volume of blood with little change in pressure?
A) vein B) arteriole C) artery D) capillary E) venule