science- variation, inheritance and evolution, yr8

0.0(0)
studied byStudied by 0 people
GameKnowt Play
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/17

flashcard set

Earn XP

Description and Tags

variation, inheritance and evolution topic key words and definitions

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

18 Terms

1
New cards

inherited variation

due to genetic information inherited from parents- genes

2
New cards

environmental variation

due to the environment

3
New cards

continuous variation

where differences between living things are grouped into categories and given a name/ label

4
New cards

discontinuous variation

where difference between living things are given a numerical/ number valueg

5
New cards

gene

a section of dna which determines a characteristic

6
New cards

how many chromosomes are in a cell

46

7
New cards

how many chromosomes are in a egg/ sperm cell

23

8
New cards

what is a different version of a gene

allele

9
New cards

how old is the earth

4.5 billion

10
New cards

survival of the fittest

the idea that only the strong can survive and breed

11
New cards

population

group of organisms of the same kind living in the same place

12
New cards

natural selection

theory that animals and plants living today descended from species that existed in the past

13
New cards

extinct

when no more individuals of a species remain

14
New cards

biodiversity

the variety of living things. it is measured as the differences between individuals of the same species or the number of different species in an ecosystem

15
New cards

competition

when two or more living things struggle against each other to get the same resource

16
New cards

evolution

process by which species change over time in response to environmental changes and competition for rescources

17
New cards

what are the 4 causes of extinction

destruction of habitat, predators, disease, mutations

18
New cards

what are changes in genes called

mutations