Evidence for Evolution
The fin of a dolphin has a similar bone structure to the front legs of an iguana. Which branch of evidence would indicate this?
Comparative Anatomy
The type of selection that prefers the two extreme phenotypes is:
Disruptive Selection
A reproductive barrier exists that prevents fertilization overall. The process of fertilization cannot take place; the sperm cell never joins with the egg cell. Which category of reproductive barrier does this fall under?
Prezygotic Barrier
Darwin's findings indicate that the process of evolution occurs via "survival of the fittest." This is also known as:
Natural Selection
A drastic reduction in population size by chance is referred to as the:
Bottleneck Effect
The amino acid sequences of a tiger are 77% similar to the amino acid sequences of a lion. Which branch of evidence would provide us with this claim?
Molecular Biology
A flower's color spectrum ranges from red to violet. A local species of bee has evolved an attraction to red-orange coloration. This is an example of which selection type?
Directional Selection
A population of skunks is split in two. Over time, one half of the population evolves a specific mating ritual based on coloration. The other half of the population does not engage in this mating ritual. Which type of prezygotic barrier exists?
Behavioral Isolation
The individual differences in members of a population are called:
Variations
A form of natural selection in which individuals with certain characteristics are more likely to obtain mates is called:
Sexual Selection
Archaeologists utilize the bones of ancient organisms to draw conclusions about their evolutionary history. Bones would be most useful for which two branches of evidence?
Fossil Record and Comparative Anatomy
A scientist conducts a decade-long study on the development of babies in utero. He finds that fetuses with above average placenta size are more likely to develop at an optimal rate. Fetuses with decreased placenta size are likely to be stillborn. Which type of selection is occurring here?
Directional Selection
The physical act of mating is unable to occur between two species. The male reproductive organs of a housefly cannot join with the female reproductive organs of a queen bee. This is an example of:
Mechanical Isolation
The entire collection of alleles within a population is called the:
Gene Pool
A form of speciation that occurs without geographical separation is:
Sympatric Speciation
Allopatric Speciation occurs when one population gradually forms into two species because of a geographical barrier. The analysis of habitat would be an example of which branch of evidence?
Biogeography
Wombats are an Australian marsupial that dig burrows for shelter. If the claws of the wombats are too small, they cannot establish shelter. If the claws are too large, walking is difficult. Which type of selection is occurring?
Stabilizing Selection
Two species are able to mate successfully. A fully developed offspring is birthed. However, after a few days, the offspring develops several developmental defects and dies. This is an example of:
Reduced Hybrid Viability
The process by which one population diverges into two unique species is:
Speciation
The broadest taxonomical classification is __________. The most specific is _________.
Domain; species
Comparative Anatomy may analyze structures that no longer serve important biological functions. What are these structures called?
Vestigial Structures
A Grizzly Bear population starts to exhibit changes in fur density (due to climate change). The biome becomes increasingly hot. Which type of selection is occurring and what is physically occurring in the bear population?
Directional Selection; fur density will be decreasing to accommodate higher temperatures
The proteins on the egg cell surface of an ocelot do not efficiently bind to the proteins on the surface of a coyote's sperm cell. This is an example of:
Gametic isolation
Darwin viewed several types of finches on the Galapagos Islands. These finches developed variation due to geographical separation. Which type of speciation is this?
Allopatric Speciation
Another word for an evolutionary tree is:
Cladogram/phylogenetic tree