Emma's favorite cousin...
Darwin's famous "round the world" voyage began as a "captain's helper" aboard THIS SHIP, the HMS __________________.
Vestigial Structure
This type of selection occurs when only those males with the fanciest ornamentation or the brightest colors are attractive to potential mates...leading to increasing "fanciness" in each successive generation.
Sexual Selection
This term describes the formation of new and distinct species of the course of evolutionary time.
Speciation
Before publishing his book in 1859, Darwin conferred with HIM about their mutual ideas about evolutionary change.
Alfred Wallace
Darwin's famous sketch entitled "I Think..." suggested the idea that many species descend from a single ONE of THESE.
Common Ancestor
The similarities or differences among THIS double helix shaped molecule among different species suggests their evolutionary relatedness
DNA
This type of natural selection occurs when the entire population shifts toward one extreme phenotype.
Directional Selection
This branching diagram is used to show the evolutionary relatedness among a group of organisms based on their shared characteristics.
Cladogram
This process involves HUMAN selection of desirable traits among livestock or plants, resulting in an increased frequency of those traits in the population.
Artificial Selection (or Selective Breeding)
It took nearly 20 years after his famous voyage for Darwin to publish THIS BOOK that outlined his theory of "descent with modification."
On the Origin of Species
These structures may serve different functions among different species but the physical similarity suggests a shared, common ancestry.
Homologous Structures.
This type of natural selection occurs when evolutionary pressure favors the "intermediate or average" phenotype over either extreme.
Stabilizing Selection
This characteristic of most HYBRIDS (a cross between two distinct species) prevents new species from arising from such a mating.
Infertility
Alfred Wallace may have visited Kuala Lumpur, the current capital of THIS country where he spent eight years collecting specimens and refining his ideas about natural selection.
Malaysia
In addition to Darwin's famous inferences on Finches, he also saw and observed giant tortoises and THESE, Earth's only ocean-dwelling lizards.
Marine Iguanas
This "law" in fossil studies suggests that the shallowest fossils are the most recent fossils, allowing biologists to form loose timelines of evolution.
Law of Superposition
This type of natural selection occurs when a population shifts toward BOTH EXTREME phenotypes.
Disruptive Selection
This type of speciation involves the GEOGRAPHIC ISOLATION of two groups within a population...eventually leading to two distinct species.
Allopatric speciation
Wallace collected thousands of specimens in his travels to the Amazon basin. Unfortunately, most of these specimens were lost when Wallace faced THIS disastrous event.
Shipwreck and/or fire.
Owl
Natural Selection can be observed over only a few generations in some instances. The phenotypic change in THIS SPECIES resulted from darkened, soot-covered trees during the industrial revolution.
Peppered Moth
Natural Selection is driven by the pressure to survive and reproduce. ALL OF THE WAYS that an organism exploits its environment to survive and reproduce are collectively known as its _____________.
NICHE
Life is thought to have originated on earth about 3.8 billion years ago. The first life forms where likely THESE simple cells that lack a nucleus.
Prokaryotic cells
A throwback to our "furrier" ancestors, modern humans retain this VESTIGIAL response of the arrector pili muscles that stand hairs up vertically.
Goose Bumps