Changes in biodiversity over time

Question 1

Homologours structures

Answer 1

features that have similar structures but may have a different function. evidence that the species have derieved from a common ancestry.

Question 2

analagour structures

Answer 2

similar function but different structure. evidence of diff ancestry, but paralle or convergent evolution.

Question 3

vestigal structures

Answer 3

features that resemble structures found in other species but are reduced in size and have no apparent function.

Question 4

comparing embryos

Answer 4

embryonic features, which disappear as the fetus grows, but are found in other speices are evidence of a common ancestor.
eg: our tail in womb.

Question 5

evidence for evolution

Answer 5

-homologous structures, analagour structures, vestigal structures, and comparing embryos . molecular evidence

Question 6

molecular evidence

Answer 6

-if related species have similar genes and proteins, we can predict how similar they are in terms of evolution
(amino acid sequences)
(

Question 7

Convergent

Answer 7

species become more similarly STRUCTURALLY OR FUNCTIONALLY

-smilar features because of similar selection pressures

Question 8

divergent

Answer 8

• speices become less similar
• they share a common ancestor and, because of different selection pressures CHANGE FROM EACH OTHER.
• they may have homologous structures.

Question 9

dna hybridisation

Answer 9

measures similiarity in genetic material and giv es the genetic distance b/w species (time since common ancestor)

Question 10

Identify the difference between the absolute age of a rock layer and its relative age

Answer 10

the absolute age is measured in myr whereas relative aged is measured in older than this, younger than that yeet