Unit 4 List 1 Evolution

Question 1

Amino Acid Sequencing

Answer 1

the process of identifying the arrangement of amino acids in proteins and peptides

Question 2

Analogous Structure

Answer 2

features of different species that are similar in function but not necessarily in structure and which do not derive from a common ancestral feature

Question 3

Biochemical Evidence

Answer 3

the amino acid sequence of proteins) to establish how organisms have evolved.

Question 4

Bio geography

Answer 4

the study of the distribution of species and ecosystems in geographic space and through geological time

Question 5

Cladogram

Answer 5

diagrams which depict the relationships between different groups of taxa called “clades”.

Question 6

Common Ancestry

Answer 6

an ancestral group of organisms that is shared by multiple lineages

Question 7

Anatomy

Answer 7

The study of the structure of a plant or animal.

Question 8

Descent with modifications

Answer 8

the idea that species change over time, give rise to new species, and share a common ancestor

Question 9

DNA sequencing

Answer 9

the general laboratory technique for determining the exact sequence of nucleotides, or bases, in a DNA molecule

Question 10

Electrophoresis

Answer 10

a laboratory technique used to separate DNA, RNA or protein molecules based on their size and electrical charge

Question 11

Embryo

Answer 11

the early developmental stage of an animal while it is in the egg or within the uterus of the mother

Question 12

Embryology

Answer 12

the study of the embryo and its development from a single-celled zygote (fertilized ovum) to the establishment of form and shape

Question 13

Evolutionary tree

Answer 13

a diagram that represents evolutionary relationships among organisms

Question 14

Fossil Record

Answer 14

a collection of fossils documenting the history of life on Earth

Question 15

Homologous structure

Answer 15

an organ, system, or body part that shares a common ancestry in multiple organisms.

Question 16

homology

Answer 16

similarity of the structure, physiology, or development of different species of organisms based upon their descent from a common evolutionary ancestor

Question 17

paleontology

Answer 17

the study of the history of life on Earth as based on fossils

Question 18

phenotypic similarity

Answer 18

a measure of functional redundancy within homologous gene families

Question 19

Phylogeny

Answer 19

the evolutionary history of a kind of organism

Question 20

Phylogenetic tree

Answer 20

a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor

Question 21

vestigial structures

Answer 21

features of an organism that are considered to have lost much or all of their original function through evolution

Question 22

sedimentary layers

Answer 22

distinct strata of sediment that have accumulated over time, forming the Earth’s crust and providing a record of geological history

Question 23

adaption

Answer 23

the process by which a species becomes fitted to its environment

Question 24

behavior

Answer 24

the change in activity of an organism in response to a stimulus

Question 25

competition

Answer 25

the rivalry between or among living things for territory, resources, goods, mates, etc

Question 26

fitness

Answer 26

is a quantitative representation of individual reproductive success. It is also equal to the average contribution to the gene pool

Question 27

gene pool

Answer 27

refers to the combination of all the genes (including alleles) present in a reproducing population or species.

Question 28

genetic variation

Answer 28

the presence of differences in sequences of genes between individual organisms of a species

Question 29

geographic isolation

Answer 29

the physical separation of populations of organisms from one another due to geographical barriers

Question 30

morphology

Answer 30

the study of the size, shape, and structure of animals, plants, and microorganisms and of the relationships of their constituent parts

Question 31

natural selection

Answer 31

process in which an organism adapts to its environment through selectively reproducing changes in its genotype

Question 32

phenotypic expression

Answer 32

the observable characteristics in an organism that results from the expression of genes

Question 33

physiology

Answer 33

is the study of how the human body works. It describes the chemistry and physics behind basic body functions.

Question 34

population

Answer 34

the whole number of inhabitants occupying an area

Question 35

reproductive isolation

Answer 35

the inability of a species to breed successfully with related species due to geographical, behavioral, physiological, or genetic barriers or differences.

Question 36

Sexual selection

Answer 36

the process by which individuals compete for access to mates and fertilization opportunities.

Question 37

Speciation

Answer 37

how a new kind of plant or animal species is created.

Question 38

species

Answer 38

a group of organisms that can reproduce with one another in nature and produce fertile offspring

Question 39

trait

Answer 39

a specific characteristic of an individual

Question 40

Coevolution

Answer 40

the process of reciprocal evolutionary change that occurs between pairs of species or among groups of species as they interact with one another

Question 41

Convergent evolution

Answer 41

occurs when organisms that aren't closely related evolve similar features or behaviours, often as solutions to the same problems

Question 42

Divergent evolution

Answer 42

represents the evolutionary pattern in which species sharing a common ancestry become more distinct due to differential selection pressure which gradually leads to speciation over an evolutionary time period.

Question 43

Founder effect

Answer 43

the reduction in genetic variation that results when a small subset of a large population is used to establish a new colony

Question 44

Gene flow

Answer 44

any movement of individuals, and/or the genetic material they carry, from one population to another

Question 45

Gene Frequency

Answer 45

the relative frequency of an allele (variant of a gene) at a particular locus in a population, expressed as a fraction or percentage.

Question 46

Gene pool

Answer 46

the stock of different genes in an interbreeding population.

Question 47

Genetic Drift

Answer 47

the change in frequency of an existing gene variant in the population due to random chance

Question 48

Geologic Record

Answer 48

a standard time scale that partitions the Earth's history into four eons and their subdivision of eras, periods, and epochs