From the following, select the animal with the least advanced nerve cord
a. chordate
b. arthropod
c. flatworm
d. human
e. octopus
C
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Which of the following is NOT a function of slimy mucilage in microbes?
A. protects against the host's immune system B. binds nutrients C. serves as a flotation device D. prevents desiccation (drying out) E. protects against ultraviolet radiation
When molecules are broken apart in respiration
a. the heat produced is used to drive biological reactions. b. the oxygen in the compounds that are broken apart is used as an energy source. c. the energy released in respiration is channeled into molecules of ATP. d. ATP is converted into ADP. e. ADP is released as a waste product.
Phenylketonuria (PKU) is extremely common in Ireland, affecting approximately 1 in 4500 live births. Assuming that the population is in Hardy-Weinberg equilibrium, what is the frequency of PKU carriers?
A) 0.022% B) 98.5% C) 2.9% D) 1.49% E) 2.2%
Fragile X syndrome:a
results in learning, attention, and hyperactivity disabilities in males. b. is not inherited from the parents. c. is characterized by a fragile site at the tip of the Y chromosome. d. results from a deletion of CGG sequences in the fragile X gene. e. is due to genomic imprinting..