Lecture 23 Vocab

Question 1

adaptive radiation

Answer 1

Evolution of diverse species from a common ancestor

Question 2

Allopatric Speciation

Answer 2

When a population is divided by a physical barrier leading to the formation of a new species

Question 3

autopolyploidy

Answer 3

when a new species forms because it has extra sets of chromosomes serviced from itself

Question 4

behavioral isolation

Answer 4

reproductive isolation where differences in behavior prevent mating between individuals two species

Question 5

biological species concept

Answer 5

a group of organisms can interbreed and produce fertile offspring under natural conditions

Question 6

dispersal

Answer 6

Movement of individuals or seeds from their original habitat to a new location

Question 7

ecological(spatial) isolation

Answer 7

special difference that keeps species from meeting or interacting

eg: freshwater fish and saltwater fish can meet

Question 8

gametic isolation

Answer 8

One differences in gametes prevent fusion between gametes of different species

Question 9

hybrid inviability

Answer 9

when a hybrid of species faces, challenges and development in survival

Question 10

hybrid sterility

Answer 10

When hybrids are unable to produce viable offspring

Question 11

Instantaneous Speciation

Answer 11

The rapid divergence of a population into two or more species often triggered by a specific event

Question 12

mechanical isolation

Answer 12

like a physical barrier that prevents mating due to structural differences

Question 13

morphospecies concept

Answer 13

Grouping organisms that looks similar into the same species

Question 14

Phylogenetic Species Concept

Answer 14

defining species based on evolutionarily relationships, and genetic data

Question 15

Polyploidy

Answer 15

When an organism has more than two complete sets of chromosomes, leading to the formation of a new species

Question 16

Postzygotic Isolation

Answer 16

Barriers occurring after fertilization, therefore affecting the survival or reproduction of hybrid organisms

Question 17

prezygotic

Answer 17

Barriers occurring before fertilization, preventing the formation of a zygote

Question 18

sympatric speciation

Answer 18

when a new species evolve from a common ancestor within the same geographical area(without physical, isolation)

Question 19

temporal isolation

Answer 19

when species have different mating or reproductive periods that prevent them from mating with each other.

Question 20

tetraploid

Answer 20

organism or cell that has four sets of chromosomes(polyploidy)

Question 21

vicariance

Answer 21

formation of geographical barriers(mountains etc) that lead to the physical separation of a population