Which of the following best describes cnidarians?
A) They are asymmetrical and have tissues and stinging cells.
B) They have radial body symmetry, lack tissues, but have stinging cells.
C) They have radial body symmetry, tissues, and stinging cells.
D) They have radial body symmetry and tissues but lack stinging cells.
C
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Prior to the publication of Charles Darwin's book, On the Origin of Species, what was the prevailing public consensus regarding species evolution?
A. That species were permanent and unchanging B. That species evolved through physical changes that led to success C. That species were modified over time, but did not change into new species D. That species evolved by means of natural selection
Which variable has the stronger influence on the color of an individual's skin?
A. the individual's phenotype B. the individual's genotype C. the amount of time spent in the sun and the individual's genotype D. the amount of time spent in the sun E. Neither the sun nor the individual's genotype have any influence on the individual's skin color.
You're interested in the genetics of earlobe shape on your campus. Free (unattached) earlobes are caused by a dominant allele. The attached earlobe phenotype is caused by a recessive allele
Individuals with free earlobes have either a homozygous genotype or a heterozygous genotype. Assuming that your college campus is a stable population, what calculation would you use to determine the percentage of students who have a heterozygous genotype for earlobe shape? A) Calculate the percentage of people who have free earlobes. B) Calculate the percentage of people who are homozygous-dominant for free earlobes. C) Calculate the percentage of people who have attached earlobes. D) Calculate the percentage of people who carry the recessive allele.
Chemical dyes are used to increase resolution of objects.
Answer the following statement true (T) or false (F)