C) There were more kinds of amino acids on the chondrites than are found in living organisms today. B) DNA molecules whose information was transcribed to RNA and later translated in polypeptides. D) oligopeptides located within protobionts.7) The synthesis of new DNA requires the prior existence of oligonucleotides to serve as primers. This latter observation is evidence in support of the hypothesized existence of A) a snowball Earth.
E) prevent the formation of an ozone layer.16) Which of the following statements provides the strongest evidence that prokaryotes evolved before eukaryotes? B) The meteorites that have struck Earth contain fossils only of prokaryotes. Adult female bagworm moths are larval in appearance; they lack the wings and other structures of the adult male and instead retain the appearance of a caterpillar even though they are sexually mature and can lay eggs within the bag. D) the feathers were plucked from the bodies of other adults to provide nest-building materials. SEE IMAGE The figure represents a cross section of the sea floor through a mid-ocean rift valley, with alternating patches of black and white indicating sea floor with reversed magnetic polarities.
A) Only early Earth was intensely bombarded by large space debris. C) Less ultraviolet radiation penetrated early Earth’s atmosphere.
D) Early Earth’s atmosphere had significant quantities of ozone.3) What is true of the amino acids that might have been delivered to Earth within carbonaceous chondrites?
polynucleotide polymerases without proofreading capability III. batteries of efficient polynucleotide repair enzymes IV.
polynucleotide polymerases with proofreading capability V. polynucleotide polymerases with high mismatch error rates A) I only B) I and IV C) I, III, and IV D) II and V E) II, III and V10) If the half-life of carbon-14 is about 5,730 years, then a fossil that has one-sixteenth the normal proportion of carbon-14 to carbon-12 should be about how many years old? plants and their associated fungi A) 2 and 4 B) 3 and 5 C) 1, 3, and 5 D) 2, 3, and 6 E) 2, 3, 5, and 626) If two continents converge and are united, then the collision should cause A) a net loss of intertidal zone and coastal habitat.