What are the length of DNA from a single
human cell?
a. 2 nanonmeters
b. 2 micrometers
c. 2 millimeters
d. 2 centimeters
e. 2 meters
E
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Which of the following statements best describes characteristics of Platyhelminthes?
A. They are acoelomate. B. They are triploblastic. C. They have an incomplete digestive system. D. They respire by diffusion of gases through the body wall. E. All the choices provided are true.
If an individual is heterozygous for a particular trait
A. each parent contributed a different allele for that trait. B. one parent contributed two copies of the same allele for that trait. C. one parent contributed two different alleles for that trait. D. each parent contributed the same allele for that trait.
Which of the following is NOT an effect of global
warming? a. an increase in global photosynthesis b an increase in atmospheric CO2 levels c. a probable increase in extinction of species d. changes in temperature and precipitation patterns e. changes in plant and animal life cycles
Myelinated axons conduct action potentials more slowly than axons without a myelin covering
Indicate whether the statement is true or false