Evolution
Change over time.
What is evolution?
Unicellular organism lacking a nucleus.
What is a prokaryote?
Specialized cell involved in sexual reproduction.
What is a gamete?
Diploid, spore producing, phase of an organism
What is a sporophyte?
Body plan in which body parts repeat around the center of the body; characteristic of sea anemones and sea stars.
What is radial symmetry?
Competition among members of a species for food, living space, and the other necessities of life.
What is "struggle for existence"?
Particle made up of nucleic acid, protein, and in some cases lipids that can replicate only by infecting living cells.
What is a virus?
Sequence of DNA that codes for a protein and thus determines a trait.
What is a gene?
Male reproductive structure in some algae and plants.
What is an antheridium?
Structural support located inside the body of an animal.
What is an endoskeleton?
Ability of an organism to survive and reproduce in its environment.
What is fitness?
Disease causing agent.
What is a pathogen?
Situation in which both alleles of a gen contribute to the phenotype of the organism.
What is codominance?
In gymnosperms, a seed-bearing structure.
What is a cone?
Layers of circular and longitudinal muscles, together with water in the gastrovascular cavity, that enable movement.
What is a hydrostatic skeleton?
Principle that each living species has descended, with changes, from other species over time.
What is "descent with modification"?
Process in which a virus enters a cell, makes a copy of itself, and causes the cell to burst.
What is the lytic cycle?
Situation in which one allele is not completely dominant over another.
What is incomplete dominance?
Seed-bearing structure of an angiosperm.
What is a flower?
Animal that relies on interactions with the environment to help it control body temperature.
What is an ectotherm?
Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called natural selection.
What is "survival of the fittest"?
Form of sexual reproduction in which a paramecia and some prokaryotes exchange genetic information.
What is conjugation?
Trait controlled by two or more genes.
What is a polygenic trait?
Photosynthetic organ that contains one or more bundles of vascular tissue.
What is a leaf?
Animal that generates its own body heat and controls its body temperature from within.
What is an endotherm?