In plants, most chloroplasts are inherited from the maternal plant because maternal gametes contribute the most __________ to the zygote.
A. cytoplasm
B. mitochondria
C. ribosomes
D. chlorophyll
E. cytoplasm and mitochondria
A. cytoplasm
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Which event probably made the evolution of cellular respiration possible?
a. accumulation of carbon dioxide in atmosphere b. emergence of prokaryotes c. accumulation of oxygen in atmosphere d. emergence of eukaryotes e. emergence of plants
The insulation that keeps the signal within the axon is called what?
a. myelin sheath b. glial bodies c. Nodes of Ranvier d. axon terminals
You are growing Bacillus subtilis, an aerobic bacterium that can also carry out fermentation when required, in a bioreactor and notice that the growth rate has slowed and the pH has decreased. What could you add?
A) glucose B) lactose C) peptides D) oxygen E) lactic acid
Two hydrogen atoms (atomic number 1 ) form a covalent bond. Which of the following is true?
A) Both hydrogen atoms now have two protons in their outer shell. B) One hydrogen atom now has zero electrons in its outer shell, and the other has two. C) Both hydrogen atoms now have two electrons in their outer shell. D) Each hydrogen atom still has one electron in its outer shell. E) One hydrogen atom now has zero protons in its outer shell, and the other has two.