A motor neuron and all the muscle fibers under its
control is a __________ unit.
a. neuromuscular
b. movement
c. muscle
d. motor
e. coordination
Answer: d
You might also like to view...
The Tat system is involved in
A) protein synthesis. B) transcriptional initiation. C) protein folding. D) protein secretion.
The modern scientific field of evo-devo is based on observations that:
A. a relatively minor number of mutations leading to changes in regulatory patterns during development can fuel surprisingly rapid evolution. B. very complex organisms do not necessarily have more genes than simpler organisms. C. very different species have surprisingly similar types of genes. D. All of the choices reflect observations upon which evo-devo is based.
How did Bayliss and Starling demonstrate that the small intestine secretes chemical signals that stimulate the pancreas to respond to acid?
B. They exposed a dog's small intestine to a cell extract made from a second dog's small intestine that had been exposed to acid. C. They cut out a piece of the small intestine and exposed it to acid. D. They injected pancreatic secretions from a dog previously exposed to acid into the small intestine of a second dog. E. They injected acid into the pancreas after removing all of its innervation.
Which pairs of people would provide the most useful information to geneticists, regarding the heritability of a certain trait?
A) non-twin siblings separated into different households soon after birth B) monozygotic twins separated into different households soon after birth C) non-twin siblings raised in the same household since birth D) monozygotic twins raised in the same household since birth