Photosynthesis Evald before eukaryotic cells
a. true
b. false
Answer: a. true
You might also like to view...
Which of the following tumor-suppressor genes encode proteins that inhibit cell division when cell conditions are unfavorable?
A. BRCA1. B. Rb. C. NF1. D. p16. E. All of these are tumor-suppressor genes, so they all produce proteins that inhibit cell division.
Fomites, food, and air serve as indirect transmission routes of pathogens.
Answer the following statement true (T) or false (F)
In addition to a vertebral column, all vertebrates have
A. gills. B. scales. C. a distinctive head or skull. D. a tunic. E. an open circulatory system.
In some vintage science fiction movies, space travelers find themselves on a planet orbiting a distant star in which there are curious forms of life based on silicon instead of carbon. Although the story clearly is sci-fi, there is an aura of
plausibility in the choice of silicon, an atom with 14 protons, in place of carbon as this alien life-form's central atom. The reason is that silicon: A) has four electrons in its outermost shell. B) is an isotope of carbon. C) is lighter than carbon. D) has one more proton than carbon, so is very similar to it. E) is heavier than carbon.