Eumetazoa can be subdivided into two principal branches based on ____.
Fill in the blank(s) with the appropriate word(s).
symmetry
You might also like to view...
Which of the following statements about mitochondria is false?
A) Because of the role of the mitochondria in producing cellular energy, mitochondrial diseases often affect the muscles and nervous system. B) Because mitochondria are present in the cytoplasm, mitochondrial diseases are transmitted maternally. C) Like nuclear genes, mitochondrial genes usually follow Mendelian patterns of inheritance. D) Mitochondria contain circular DNA molecules that code for proteins and RNAs. E) Many mitochondrial genes encode proteins that play roles in the electron transport chain and ATP synthesis
A trend first observed in the evolution of the earliest tetrapods was _____
A) the appearance of jaws B) feet with digits C) the mineralization of the endoskeleton D) the amniotic egg
Most of the energy that enters electron transport enters as
A) ATP. B) acetyl CoA. C) glucose. D) CO2. E) FADH2 and NADH.
Which of the following statements about pH is true?
A) The pH scale is a measure of oxygen ion concentration. B) A single unit change on the pH scale is equivalent to a 1% change in hydrogen ion concentration. C) An increase in hydrogen ion concentration means a decrease in pH scale units. D) Basic pH levels are less than 7.