Both a beetle and a lobster are arthropods, a monophyletic group of animals that have an exoskeleton with jointed appendages.  Both the lobster and the beetle have antennae, modified legs that serve as sensory structures.  Antennae were also found in the common ancestor of beetles and lobsters.  This is an example of…. Group of answer choices A. allopatric speciation B. intrasexual selection C. intersexual selection D. convergence E. homology

Use each of the following species concepts to write a claim about whether the dark and light fur mice are, in fact, different species. Your claim should demonstrate your understanding of that particular species concept. Mice with light coat colors are found in populations scattered across the southeastern US. Researchers believe the light coat color emerged in a single population.   How would a biologist explain the evolution of the light coat color in populations across the southeastern US? Briefly explain your reasoning.

A. Genetic drift refers to a. change in the way the body functions as a result of stressors. b. changes in the DNA sequence, particularly in sex cells. c. random changes or accidents that reduce genetic variation in a population. B. All human cultures a. can be correlated with "races" in the past. b. are unchanging and eternal. c. can be ranked as "primitive" or "advanced". d. are integrated and complex. d. exchange of genes when outsiders migrate into an area.

In which of the situations below would speciation be most likely to occur? You can choose more than one answer. a. Seven lemurs escape from an enclosure at Duke University. To everyone's surprise, they establish a small but viable population coexisting successfully with humans in a partly suburban environment very different from their native Madagascan habitat. b. Bighorn sheep occupy mountains from Canada to Death Valley in Southern California, interbreeding all along the way. The populations at the two ends of the range live in very different environments. c. A few individuals of a butterfly species were blown to an island during a severe storm. d. A population of juniper shrubs is split by the formation of a canyon. Every year, strong winds carry a small amount of the shrubs' pollen across the canyon.

Several new tetraploid species of a plant called salsify (Tragopogon) have arisen in western North America. These new species each arose from a diploid species that went through the process of allopolyploidy. This mode of speciation is a type of ________ and it occurs ________.   A. allopatric speciation; almost instantaneously   B. sympatric speciation; gradually   C. allopatric speciation; very slowly   D. sympatric speciation; quickly

Climate change and glacial advances during the Pleistocene ice age (2.6 million to 11,700 years ago) split the ranges of several North American bird species into western and eastern populations. The western and eastern populations eventually diverged into two species. What is this an example of? A. Allopatric speciation following dispersal B. Allopatric speciation via vicariance C. Sympatric speciation due to balancing selection D. Sympatric speciation via autopolyploidy E. Sympatric speciation via allopolyploidy

Hardy Weinberg equilibrium (HWE) describes a situation in which the relative frequencies of alleles do not change over generations. which of the following could prevent HWE from being maintained? A. New mutations B. All individuals reproducing equally C. Random mating D. No individuals entering the population

The Galapagos archipelago consists of volcanic islands that formed within the last 5 million years. Darwin wrote of the finches on these islands, "...from an original paucity of birds in this archipelago, one species has been taken and modified for different ends." The Galapagos finches are an example of adaptive radiation driven by a. behavioural innovation. b. morphological innovation. c. ecological opportunity. d. physiological innovation.