Nematodes and arthropods both _____
A) develop an anus from the blastopore (pore) formed in the gastrula stage
B) are suspension feeders
C) grow by shedding their exoskeleton
D) are lophotrochozoans
E) have ciliated larvae
Answer: C
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Rett syndrome results from
A) a microRNA that binds the wrong set of mRNA targets. B) unstable transposons. C) fetal hemoglobin that is reactivated in a child. D) abnormal methylation of a gene expressed in the brain.
Bicarbonate forms when ________ splits
a. H2CO2 b. CO2 c. HCO3- d. H2O e. H2CO3
The limpet-like Neopilina was thought to be extinct for over
a. 100 million years. b. 175 million years. c. 250 million years. d. 350 million years. e. 1 billion years.
Insects and other arthropods have a _____
1.Endoskeleton 2.Exoskeleton 3.Ectoskeleton 4.Hydrostatic skeleton 5.Proteinacious skeleton