Life 103 - Colorado State University
Exam 3 questions well answered
2025/2026
Dead Seeds - ANS ✔✔the genotype is gone.
Cryogenics - ANS ✔✔Study of materials at cold temperatures.
General concerned with temperatures below -150 C
Liquid Nitrogen
Liquid Helium
Cryonics - ANS ✔✔Freezing Organisms
Currently a one way process for humans
Cellular damage
Can only be performed postmortem
Cryobiology - ANS ✔✔The study of cold temperature on living things
Cryopreservation
->The use of cold temperatures
Preserving seeds - ANS ✔✔Research at seedbanks for decades
Two main ideas
->Drying Seeds
->Cooling seeds
Combo of the two seems to provide an optimal solution for some seeds
, Orthodox seeds
->Temperate climate, low oil seeds
Recalcitrant seeds
->Many tropical species and species with high oils
Genetic Drift - ANS ✔✔Random Process
Larger effect on smaller populations
Alleles can move towards fixation or extinction
Clade - ANS ✔✔Have a common ancestor
Taxon - ANS ✔✔Evolutionary trait/group
Ediacaran Origin - ANS ✔✔Animals Evolved, including extant taxa and extinct forms.
Cambrian Explosion - ANS ✔✔Oldest Fossils of half of extant animal phyla
Most major animal body plans evolve
Defining Characteristics of Animals - ANS ✔✔Multicellular
Ingestive heterotrophs
Lack cell walls, have structural proteins (such as collagen)
Unique, specialized cells: nerve and muscle
Sexual reproduction
2n Dominant
Flagellated sperm, non-motile egg
Most have Larval stage
Exam 3 questions well answered
2025/2026
Dead Seeds - ANS ✔✔the genotype is gone.
Cryogenics - ANS ✔✔Study of materials at cold temperatures.
General concerned with temperatures below -150 C
Liquid Nitrogen
Liquid Helium
Cryonics - ANS ✔✔Freezing Organisms
Currently a one way process for humans
Cellular damage
Can only be performed postmortem
Cryobiology - ANS ✔✔The study of cold temperature on living things
Cryopreservation
->The use of cold temperatures
Preserving seeds - ANS ✔✔Research at seedbanks for decades
Two main ideas
->Drying Seeds
->Cooling seeds
Combo of the two seems to provide an optimal solution for some seeds
, Orthodox seeds
->Temperate climate, low oil seeds
Recalcitrant seeds
->Many tropical species and species with high oils
Genetic Drift - ANS ✔✔Random Process
Larger effect on smaller populations
Alleles can move towards fixation or extinction
Clade - ANS ✔✔Have a common ancestor
Taxon - ANS ✔✔Evolutionary trait/group
Ediacaran Origin - ANS ✔✔Animals Evolved, including extant taxa and extinct forms.
Cambrian Explosion - ANS ✔✔Oldest Fossils of half of extant animal phyla
Most major animal body plans evolve
Defining Characteristics of Animals - ANS ✔✔Multicellular
Ingestive heterotrophs
Lack cell walls, have structural proteins (such as collagen)
Unique, specialized cells: nerve and muscle
Sexual reproduction
2n Dominant
Flagellated sperm, non-motile egg
Most have Larval stage
