First Half of Course Flashcards
Nodes
Indicate a common ancestor
Homology
When a trait is similar because of a common origin
Convergent Evolution
When a trait develops independently in multiple populations
Surface area: volume ratio ___________ as size increases
decreases
Why does surface area: volume ratio matter?
to maintain metabolism, the cells and body must be able to transport molecules quickly, but ((()))
Origin of Earth
4.5 BYA
Origin of prokaryotes
3.5 BYA
Origin of unicellular eukaryotes
2.1 BYA
Origin of multi-cellular eukaryotes
1.5 BYA
Isogamy
Both gametes have similar morphology/ size
Anisogamy
Gametes have different morphology/ size
(eg. sperm & eggs)
Sexual vs. asexual reproduction
Sexual- two haplontic cells join- genetic variation
Asexual- exact copy of parent- no genetic variation
Diplontic vs Haplontic
Diploid cells have two copies of each chromosome
Haploid cells have one chromosome
Alternation of generations
Sporophyte and gametophyte generations
How do plants obtain nutrients?
Photoautotroph
-carries out photosynthesis