What scientific concept did Charles Darwin and Alfred Wallace independently discover?
Natural selection
Which variable increases the likelihood of allopatric speciation taking place more quickly?
What is the difference between micro- and macroevolution?
Microevolution describes the evolution of populations, while macroevolution describes the emergence of new species over a long period of time.
Galápagos medium ground finches are found on Santa Cruz and San Cristóbal islands, which are separated by about 100 km of ocean. Occasionally, individuals from either island fly to the other island to stay. This can alter the allele frequencies of the population through what mechanism?
Gene flow
The fact that DNA sequences are more similar in more closely related organisms is evidence of what?
Descent with modification
In which of the following pairs do both evolutionary processes introduce new genetic variation into a population?
Population genetics is the study of __________.
How allele frequencies change over time
Which situation would most likely lead to allopatric speciation?
The wing of a bird and the arm of a human are examples of ________.
Homologous structures
What is the main difference between dispersal and vicariance?
One involves the movement of organisms, whereas the other involves a change in the environment.
What kind of trait is important to cladistics?
Shared derived traits
What best describes a branch point in a phylogenetic tree?
New lineage
What is true about organisms that are a part of the same clade?
They evolved from a shared ancestor.
What is a phylogeny a description of?
Evolutionary history
Which statement about analogous structures is correct?
A monophyletic group is a ________.
Clade
What do scientists in the field of systematics accomplish??
Organize and classify organisms
Which assumption of cladistics is stated incorrectly?
Which statement about the taxonomic classification system is correct?
What best describes the relationship between chimpanzees and humans?
Chimpanzees and humans evolved from a common ancestor.
The first forms of life on Earth where thought to be
Prokaryotes
The first organisms that oxygenated the atmosphere were
Cyanobacteria
Which of the following consist of prokaryotic cells?
Prokaryotes stain as Gram-positive or Gram-negative because of differences in the ________.
Cell wall
Prokaryotes that obtain energy from chemical compounds are called
Chemotrophs
Bioremediation includes
The use of prokaryotes to clean up pollutants.
What event is thought to have contributed to the evolution of eukaryotes?
Mitochondria most likely evolved from
Aerobic bacteria
Protists with the capabilities to absorb nutrients from dead organisms are called
Saprobes
What parasitic protist evades the host immune system by altering its surface proteins with each generation?
Trypanosoma brucei
What polysaccharide is usually found in the cell walls of fungi?
Chitin
What term describes the close association of a fungus with the root of a tree?
A Mycorrhiza
The land plants are probably descendants of what group
Green algae
The event that leads from the haploid stage to the diploid stage in alternation of generations is
Mitosis
Moss is an example of what type of plant?
Haplontic plant
Why do mosses grow well in the Arctic Tundra?
They do not have true roots and can grow on hard surfaces.
What group of seedless vascular plants are the most diverse?
The Ferns
.Which group are vascular plants?
Which of the following traits characterizes gymnosperms?
What adaptation do seed plants have in addition to the seed that is not found in seedless plants?
Pollen grains develop in what structure?
The anther
Corn develops from a seedling with a single cotyledon, Displays parallel veins on its leaves, and produces monosulcate pollen. It is most likely
A monocot
Which of the following is not a feature common to most animals?
Which of the following does not occur?
The large central opening in the proferian body is called the
Osculum
Cnidocytes are found in
Phylum Cnidaria
Cubozoans are
Medusoids
What group of flatworms are primarily external parasites of fish?
Monogeans
Crustaceans are
Ecdysozoans
A mantle and mantle cavity are present in
Class Polychaeta
Annelids have a
True coelom
Echinoderms in their larval state have
Bilateral symmetry
The circulatory fluid in echinoderms is
Water
Which of the following is not a member of the phylum Chordata?
Members of Chondrichthyes differ from members of Osteichthyes by having a
Cartilaginous skeleton
Squamata includes
Sweat
Which of the following is a Monotreme?
Which of the following statements about common features of chordates is true?
Zuletzt geändertvor einem Monat