A3.1 e other

Question 1

definition of a species

Answer 1

a group of organisms that can reproduce to produce fertile offspring

Question 2

when does the speies example not work

Answer 2

with male lions and female tigers breed cause the ligers are fertile

Question 3

binomial system

Answer 3

genus species

capiltalised and underline

Question 4

how can we discover chromosome number + how to compare

Answer 4

karyograms

we can compare lenght
position of centromers (If dna replication has happened)
banding patterns

Question 5

speciation is

Answer 5

when new species are formed by the splitting of one pre-existing species into 2+

Question 6

role of titin

Answer 6

is a protein

helps sacromeres recoil after stretching and prevents overstretching

Question 7

directional and disruptive selection

Answer 7

both change allele frequency

directional favors 1 extreme phenotype while disruptive favors both/2 extreme phenotypes

Question 8

gene pool

Answer 8

sum of all alleles of genes in a population

indicator of genetic diversity

Question 9

when evolution happens, the

Answer 9

gene pool changes

Question 10

frequency of allele x formula

Answer 10

frequency of x /total n of genes in population

Question 11

niche

Answer 11

the position of a species within an ecosystem or communithy and its relationship w both biotic and abiotic factors

Question 12

fundamental niche vs realised niche

Answer 12

fundamental is range of enviromental conditions where a particular species can theoretically live

realised is range of enviromental conditions where a particular species actually lives

Question 13

example of fundamental niche vs realised niche

Answer 13

chthalamus and balanus

balanus has a latgrr fundamental niche than cht

but

cht is a better competitor, so has a larger area

Question 14

name fornutrition when food is ingested,

Answer 14

holozoic

Question 15

principal of competitive exlcusion

Answer 15

no 2 organisms can indefinitrly occupy the same niche, 1 will alwyas out compete

Question 16

example of principal of competitive exlcusion

Answer 16

2 protozoan species
paramecium aurelia
paraceium caudatium

need similar space and nutrience

alone thrive

together, paramecium aurelia becomes extinct