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bio 20 - Unit A - A.1 > b2 > Flashcards

b2 Flashcards

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Biology 101 flashcards
1
Q

prezygote/ before the zygote/ mating

A

prevents fertilization

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2
Q

habitat isolation

A

type of prezygotic factor
species live in different areas that’ll never meet so they don’t mate
eg. land snake vs water snake

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3
Q

mechanical isolation

A

physical attributes prevent mating

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4
Q

behavioural isolation

A

rituals to attract mates, sometimes doesn’t work

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5
Q

sources of genetic variation

A

mutations: change in dna, random

sexual reproduction: mom and dad mix alleles to make combination

asexual reproduction: cloning ur genes lmfao what

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6
Q

why is genetic diversity important

A

rich ecosystem
better for adaptation

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7
Q

lamarks theory

A

parts of body’s are used more than others
they grow stronger and bigger
gets passed down to offsprings
not really accurate lmfao

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8
Q

darwin’s theory

A

theory of natural selection
those who are the best fit for the weather/ season/ conditions will live

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9
Q

evidence of evolution: fossils

A

most direct evidence of evolution

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10
Q

evidence of evolution: biogeography

A

geography in the past and present
species who are similar but live in different places were close to each other geographically

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11
Q

evidence of evolution: anatomical

A

comparing species bone structure to find similar ancestor
eg. finding similar useless bones between 2

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12
Q

evidence of evolution: embryological

A

comparing embryos
similarities between fertilized cells and growth

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13
Q

evidence of evolution: bio chemical

A

dna and chromosomes similarities means more closely related

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14
Q

evidence of evolution: artificial selection

A

similar plants share breeding ancestor

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15
Q

gradualism

A

gradual adaptive features change slowly overtime

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16
Q

punctuated equilibrium

A

changes in species are quick
eg. bird gizmo

17
Q

patterns of speciation

A

there are 2 ways speciation can happen:
1. transformal evolution where species are mutating and adapting to environmental changes
2. a species branch out to 2 different species

18
Q

temporal isolation

A

species breed at diff times of year

19
Q

gametic isolation

A

female don’t like some male sperm lmfao

20
Q

homologous

A

species have similar structures and ancestor, but not function
eg. dog and human muscle

21
Q

analogus

A

species have similar functions, but no common ancestor and different structure
eg. bird, bat, butterfly

22
Q

darwin observations

A

population no grow
food and resources are competed for
variation between species
more offspring than can survive
variations are heritable

23
Q

darwin inferences

A

bio 20 - Unit A - A.1 (8 decks)

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