University:
University of Ottawa
Course:
BIO1130 | Introduction to Organismal Biology
Academic year:

2024
Views:

426

Pages:

2
Author:

Noodle D

Animals are from the domain Eukarya, very closely related to choanoflagellates indirect evidence of animals in the presence of cholesterol in fossils, heterotrophs (Elysia chlorotica is an exception to this, they're kleptoplasts). There is of horizontal gone transfer (no vertical transfers that anabasis). between these kleple plasts and other sorganisasier Animals are able to reproduce sexually asexually embryo goes through the blastula stage during development, don't have a cell wall but have collagen to maintain support cadherin parking allow cells to adhere to one another which leads to multicellularity pcell communication. Sponges are the group that diverged the earliest they have choanocytes and amoebocytes. Eumelazo have neurons membraneous layer. tissues the I are separated by a The spam cell is long for sexual competition and blocks entry of other sperms. Asexual reproduction can be budding (ex jellyfish), fragmentation(ex planaria) through the presence of neoblasts, and parthenogenesis. body plans. are radial symmetry and bilateral symmetry, these are due to hox genes that determine different organ positions, etc. Hax genes are part. Most animals have alevval stage that's morphologically different of homeotic genes. then the adult stage Embryogenesis zygote cleaves and forms a blastula which undergoes gastrulation (coll differential) and forms a gastrula through many infoldings and this leads to tissue differentiation. The involving represents the primitive gut since it "swallows in the external environment •hereased body size & surface/volume.. • Decreased body size 1 surface/volume.. Metabolic reactions depend on temperature, acreased lemperatures degrade necessary enzymes, so organisms thermoregulate to main lain homeostasis. endo tharms use an internal heat source like metabolism L- ecto therms use an external heat source lite sunlight. amstamay at home atharons regulate based on temperatures in the external environment operators poikilo therons tolerate fluctuating changes. Domoregulation refers to when hat/dry environments cause water lass by trying to regulate temperatures (ex: sweating to cool the body) - There are many adaptations to regulate water loss: - the presence of cells that retain Nat; it'll cause water reason. presence of sweat glands for evaporation & cooling. presence of kidneys that concentrate the urine production of uric acid to avoid waler loss. Many features of the eye are the result of convergent evolution but also many features. evolved independently. The nervous system evolved from being very diffused to mare complex and centred. in organisms -fore brain Info processing, kerning - midbrain sensory information processing. - hindbrain blood circulation, locomotion, involuntary movements. size of brain region correlates to its importance.