Exam 1
This trophic group is hard for an ecosystem to support because so much energy is lost at each level of energy exchange.
What are tertiary consumers?
This genetic event is the ultimate source of new heritable variation in a population.
What are mutations?
This bacterial group has a cell wall comprised of a thick layer of peptidoglycan.
What are gram-positive bacteria?
These three traits determine the characterization of the animal body plan.
What are symmetry, tissues, and a body cavity?
These factors affect the size of a population experiencing low levels of emigration and immigration.
What are survivorship and reproductive rates?
This measure is the amount of light energy that is converted to chemical energy minus the energy used by primary producers for their cellular respiration.
What is net primary productivity?
Two species with a recent common ancestor are most likely to share these.
This group of plants evolved seeds first.
What are gymnosperms?
While sponges exhibit basic embryonic development and specialized cells, they lack this feature of other metazoans.
What are tissues?
This unique developmental feature directly gives rise to the tissue layers in animals.
What is the gastrula?
Resource availability or interactions between individuals may influence this characteristic of a population.
What is dispersion?
This method of speciation involves a geographic barrier between populations.
What is allopatric speciation?
Toxoplasma, Trypanosoma, and Plasmodium are examples of protists with this type of lifestyle.
What is parasitic?
This trait is shared by all vertebrates, except cyclostomes, at some point in their development.
This structure evolved when a eukaryote ancestor engulfed a heterotrophic prokaryote.
What are mitochondria?
When a population exhibits slower aging and longer lives, but lower reproduction rates, it is said to have this selection strategy.
What is K selection?
Two related plants that flower at different times during the season are separated by this type of reproductive barrier.
What is a prezygotic barrier?
What are fungi and animals?
The lateral line system is a sensory organ found in these vertebrates.
What are (fish)(aquatic gnathostomes)?
The most parsimonious phylogenetic tree will have the fewest number of these.
What are evolutionary events?
This principle of community ecology differs from resource partitioning because it is directly linked to the evolution of genotypes that have allowed alternate resource use.
What is character displacement?
This type of phylogenetic group includes only some of the descendants of an ancestor but not all.
What is paraphyletic?
What is pollen?
This diapsid lineage is the phylogenetic sister group to archosaurs.
What is lepidosaurs?
These mammals' young have a period of development outside the mother's uterus and gain the majority of their nutrients from milk.
What are marsupials?