The polyester polymer on the leaves of vascular plants that protects them from pathogens is called:
A. lignin
B. cutin
C. chitin
D. cellulose
E. All of the other choices offered are incorrect
B. cutin
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Suppose a human metabolic disease only allows electrons to be used from NADH and not FADH2. What is a
probable cause of this disease?
a. a defect in assembly protein genes for complex II of the electron transfer system b. enzyme defects in glycolysis and the citric acid cycle c. a deficient amount of cytochrome c and coenzyme Q d. improper regulation of phosphofructokinase e. inability of oxygen to act as a final electron acceptor
Which of the following is not involved in muscle contraction?
1.An action potential that releases ACh at the neuromuscular junction. 2.An action potential that releases norepinephrine at the neuromuscular junction. 3.An action potential carried by T tubules. 4.Opening of voltage gated channels in the sarcoplasmic reticulum.
Explain the two main types of studies that showed the genetic basis of ASDs
What will be an ideal response?
According to the biological species concept, for speciation to occur, _____
A) the number of chromosomes in the gene pool must change B) changes to centromere location or chromosome size must occur within the gene pool C) large numbers of genes that affect numerous phenotypic traits must change D) at least one gene, affecting at least one phenotypic trait, must change