Take Home Test

4

A common ancestor for both species C and E could be at position number

L. "bicolor", L.parviflorus, L. Latisectus

According to the figure, which of the following represents a monophyletic group?

E-B-C-D-A

Bvased on the tabular data and assuming that time advances vertically, which cladogram is the most likely depiction of the evolutionary relationships among these five species?

directional selection

Fossil evidence indicates that horses have gradually increased in size over geologic time. Which of the following terms best describes this?

2-4-1-3

Given a population that contains genetic variation, what is the correct sequence of the following events under the influence of natural selection?

P and S only

Group IV of the cladogram most likely includes which of the following species?

B and C only

Ichthyosaurs were aquatic dinosaurs. Fossils show us that they had dorsil fins and tails, as do fish, even though their closest relaties were terrestrial reptiles thaT HAD NEIGHTER DORSAL FINS NOR AQUATIC TAILS. tHE DORSAL FINS AND TAILES OF ICHTHYOSAURS AND FISH ARE

D and F

If organisms A, B, and C belong to the same class but to different ordersand if organisms D, E, and F belong to the same order but to different families, which of the following pairs of organisms would be expected to shows the greatest degree of structural homology?

Sexual selection

If the males' halteres have species-specific size, shape, color, and use in courtship displays, and if the species' ranges overlap, then the speciaition events may have been driven, at least in part, by which of the following?

both A and C

If the original finches that had been blown over to the Galapagos from South America had already been genetically different from the parental population of South American finches, even before adapting to the Galapagos, this wold have been an example of

Reduced hybrid fertility

Matings between individuals from the two populations of Rhagoletis produce hybrid flies that appear to be healthy and have nomrallife spans. The eggs laid by these hybrid flies, however, hatch less often than those of flies from either of the two populations. What isolating mechanism seems to be important in this hybrid population?

Stabilizing selection

Most swiss starlings produce four to five eggs in each clutch. Those producing fewer or more than thishave reduced fitness. which of the following terms best describes this?

Habitat

One species lives only in tree holdes; another species lives only in streams

RNA was the first hereditary information

RNA molecules can both carry genetic information and be catalytic. This supports the proposal that

Individuals with different adaptations in shell shape and leg length best exploited the food resources and left more survivng offspring on each island

Smaller, drier islands are inhabited by tortoises with longer necks and limbs and with shells that are elevated above the neck, which allow them to browse taller vegetation. Based on the infromation given, which of the following is a plausible explanation for the ancestry of the tortoise subspecies?

A and C only

Structures as different as human arms,bat wings, and dolphin flippers contain man of the same bones, these bones having developed from verysimilar embryonic tissues. How do biologists interpret these similarities?

Allopatric speciation

The different species of darwin finches have all evolved on islands of the Galapagos archipelago within the 3 past million years. All are from a single south american finch species that colonized the islands. The islands are far apart, and they have a variety of environmental conditions. Which of the following statements best represents the type of speciaition that gave rise to these fourteen species?

The apple tree was imported into north america with european settlement approximately 200 years ago

The divergence between the two populations of Rhagoletis must have occurred very rapidly because

Instructions coded in nucleotide sequences

The relatedness of all living things on earth stems from the fact that all forms of life have

Apoptosis involves the regulated activation of proteins in specific cells of the developing forelimb that leads to the death of those cells

The vertebrate forelimb initially developes in the embryo as a solid mass of tissue. As development progresses, the solid mass near the end of the forelimb is remodeled into individual digits. Which of the following best explains the role of apoptosis in remodeling of the forelimb?

Biological

There is still some controversy among biologists about whether Neandethals shoul be placed within the same species as modern humans, or into a separate species of their own. Most DNA sequence data analyzed so far indicate that there was probaly little or no gene flow between neandetthals and Homo sapiens. Which species concept is most applicable in this example?

Convergent evolution of self-compatibility originally fooled taxonomists into classifying three separate species as L. "bicolor"

What is the best explanation for the L. Bicolor species name showing up in three different locations within the phylogeny of this plant genus?

4, 1, 3, 2, 5

What is thought to be the correct seuqence of these events. from earliest to msot recent in the evolution of life on earth

3

Which of the following numbers represents a polyphyletic taxon?

Populations tend to increase at a faster rate than their food supply normally allows

Which of the following represents and idea that darwin learned form the writings of thomas malthus

The appendix has a substantial amount of defensive lymphatic tissue

Which of the following statements most detracts from the claim that the human appendix is a completely vestigial organ?

A new species forms most of its unique features as it comes into existence and then changes little for the duration of its existence

Which of the following would be a position held by an adherent of the punctuated equilibrium theory?

D

Which stratum should contain the greatest proportion of extinct organisms?

eACH OF THE MASS EXTINCTIONS COINCIDES WITH A LWOERING OF SEA LEVELS

tRUE STATMENTS ABOUT EXTINCTION EVENTS?

Compare DNA or protein sequences of L. Bicolor species with that of other Leptosiphon genus

which of the following would be a plausible technique for scientists to determine if the three separate groups of the flowers known as L.Bicolor are indeed one species of three separate species?