#evolution notes

👩🏾‍💻09.03.2019 || 2:36 pm

Before and After!

I feel like I’ve been taking notes on chapter 6 forever, it’s really long and on a subject I know nothing about (primates). Above you can see my first attempt at notes feat. a messy desk, and today’s attempt with slightly more order.

Kingdom = Animalia

Phylum = Chordata

Class = Mammalia

Order = Primates

Family = Hominidae

Subfamily = Homininae

Genus = Ardipithecus

Species = A. kadabba

.

-- extinct lineage

-- earliest gnathostomes

-- armored vertebrates

-- name means “plate-skinned”

-- most were less than a meter long

-- some were more than 10 meters long

-- diverged 420 million years ago

-- diverged into      -- chrondrichthyes      -- ray-finned fishes      -- lobe-fins

.

-- also called positive selection

-- an extreme phenotype is favored above all other phenotypes

-- caused when an extreme allele is the most advantageous

-- because this allele increases survival or reproductive capability, carriers of it will produce more offspring

-- because they produce more offspring, the allele will increase in frequency

-- first described in Charles Darwin’s “On the Origin of Species”

-- examples      -- African cichlids      -- sockeye salmon