You are a paleontologist and you have been invited to serve on a NASA astrobiology panel that speculates on what features of life are so universal that they should also apply to separate origins of life on other planets
Which of the following features is the most likely to be universal to all life even if it originated independently in other places than Earth?
a. Evolution will eventually produce feathers in some organisms.
b. All life uses DNA to encode genetic information.
c. Evolution will always result in multicellular organisms.
d. Lineages of organisms will tend to evolve more complex forms during the course of their evo-lution.
e. C and D.
D
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Compare and contrast the chromosome structure of viruses, bacteria, and eukaryotes
What will be an ideal response?
Self assembly of complex molecules structures was first demonstrated studies of:
A) ribosomes B) cytoskeleton C) tobacco mosaic virus D) molecular chaperones E) hemoglobin
Which of the following is true of the animal pole of a zygote?
A) The animal pole produces larger cells than the vegetal pole. B) The animal pole is closer to the nucleus than the vegetal pole. C) The animal pole is hollow. D) The animal pole becomes the entire embryo.
Which statement is not a reasonable fear of genetically modified foods?
a. The loss of genetic diversity among crop plants is risky. b. Genetically modified foods are unnatural. c. Eating genetically modified foods could be dangerous. d. Organisms that we want to kill may become invincible. e. Organisms, such as the monarch butterfly, that we don't want to kill may be killed inadvertently.