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Zoology 101

QuestionAnswer
Sponges are unusual among animals because they lack? Tissues
According to the essay by Thomas Malthus, as population increases, so does? Competition
In Science, a law is? a cause-effect relationship that is usually true
All cnidarian animals have? radial symmetry, nematosis, three tissue layers
In tissue-organ tissue complexity/organization, the division of labor is among? Organs
The type of symmetry that results in the development of a specific head end of an organism? Bilateral Symmetry
If you have a group of organisms that you think are very closely related, than they should have what in common? Synapomorphies
The scientific name of an organism is comprised of which two taxinomic rankings? Genus + Species
Characteristics of an organism that you can count are called what traits? Meristic
A niche represents the basic needs for an organism's survival
During development, the anus is the first end of the alimentary canal to form Deuterosomes
The embryos of these organisms divide using spiral clevage Protosomes
These organisms display mosaic development Protosomes
These organisms form the coleom via outpocketing in the embryo Deuterosomes
What is another term for outpocketing in the embryo? enterocoelous development
The echinoderms, hemichordates and chordates are examples of these organisms Deuterosomes
Formed by the sclerocytes and help to support the body of a sponge Spicules
During sexual reproduction, these become sperm Choanocytes
These cells have flagella and help to bring food and oxygen into the sponge Choanocytes
These cells are multi-purpose cells, transforming into one of four different specialized cells Archaeocytes
During sexual reproduction, these cells become eggs Archaeocytes
A group of interacting populations of different organisms Community
A colony of small, isolated groups of individuals that interact via migration Metapopulation
The ecological level that actually undergoes evolution Population
The organic and inorganic conditions in which an organism lives Environment
A type of population that can be thought of as either a "source" or a "sink" Deme
What do Cnidarians lack Tissues
Another name for the scientific method Hypothetico-deductive method
Who first proposed that the earth could be millions of years old? Charles Lyell
In Cndarians what represents inversions of one another Polyp and Medusa
Natural Selection Mechanism by which evolution works to shape organisms
Created by: Valfuth
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