2.01-2.02 LOs

What 2 things are affected by cell size

Transport Distance for nutrients, Surface Area for exchange at plasma membrane

Amoeba

Single cell w/maximal Surface Area

Hydra

Multicellular Organism with all cells in direct contact w/environment

Triploblastic Animal

High specialized systems

5 Stages of Development (Animals)

Proliferation, Programmed Cell Death, Differential Expansion/Movement, Cell Differentiation, Induction (Cell-cell interactions)

Morphogens

Concentration Gradients in developing embryos

Budding, Fragmentation, & Parthenogenesis

External vs Internal Fertilization

Only in aquatic environment, many gametes, synchronous release
Mostly terrestrial animals, direct contact

Anisogamy

difference in gamete size between sexes

Parental Investment

any investment that increases chance of offspring survival at cost of parents ability to invest in other offspring

Direct vs. Indirect Competition

Before vs. After mating

4 Mating Systems

Monogamy, Polygyny, Polyandry, Promiscuity

Monogamy

Often occurs in resource-poor environments, where offspring will not survive without mutual parental investment

Polygyny (2 types)

Harem - male control territory or female group
Lek - males congregate for display & females choose

Polyandry

High predation where maximal egg production/fertilization is necessary, (males are limiting resource)