The first animal group to show extracellular digestion was the
A. cnidarians.
B. sponges.
C. roundworms.
D. flatworms.
Answer: A
You might also like to view...
The hippocampus, amygdala, and hypothalamus are the major components of the ______ system.
A. sympathetic B. reflex C. parasympathetic D. limbic E. autonomic
Impulses conducted along the transverse tubules of the muscle fiber stimulate
A. the release of ATP. B. the binding of actin to the Z lines. C. tropomyosin and troponin binding. D. the release of calcium ions. E. the release of acetylcholine.
RNA splicing involves the
A) addition of a nucleotide "cap" to the molecule. B) addition of a nucleotide "tail" to the molecule. C) removal of introns from the molecule. D) removal of exons from the molecule.
The (incubation/morbidity/prodromal) period is the time between infection and the occurrence of the first symptoms or signs of the disease
What will be an ideal response?