Which of the following has four pairs of flagella?
A. Giardia lamblia
B. Balantidium coli
C. Entamoeba histolytica
D. Toxoplasma gondii
E. Naegleria fowleri
Answer: A
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A chemical imbalance in the blood can cause the heart to stop pumping blood, which will have a detrimental effect on other organs. This observation can be attributed to:
A. Equilibrium state B. Emergent properties C. Reductionism D. Evolutionary conservation
In the brain, the visual centers are located in the occipital lobes
____________________ Indicate whether the statement is true or false.
Which organism exhibits meroblastic cleavage?
a. echinoderms b. amphibians c. mollusks d. annelids e. birds
Familial hypercholesterolemia is a disease that is incompletely dominant. This means that
A. the dominant allele completely masks the recessive allele, so the dominant phenotype is displayed. In the case of familial hypercholesterolemia, heterozygotes will have extremely high levels of cholesterol, identical to those seen in homozygous dominant individuals. B. the dominant allele does not fully mask the recessive allele, so an intermediate phenotype is displayed. In the case of familial hypercholesterolemia, heterozygotes have moderately higher levels of cholesterol compared to normal. C. the dominant allele is equally dominant with a second (or third) dominant allele, so both phenotypes are displayed. In the case of familial hypercholesterolemia, heterozygotes have moderately higher levels of cholesterol compared to normal. D. multiple alleles exist for this trait, so multiple phenotypes are possible. In the case of familial hypercholesterolemia, heterozygotes can have a range of cholesterol levels depending on which combination of alleles exists.