BIO 469 Lecture Notes - Lecture 7: Animal, Stromatolite, Molecular Clock
13 Jun 2018
School
Department
Course
Professor
8/28/17 Monday
Animal: Metazoan
● Heterotrophic
○ Consumes food available in the environment ( doesn’t produce it’s own food;
photo,chemo,etc)
● Mobile
○ Able to actively move at some stage of lifestyle
● Have a nervous system
○ Bundle of nerve endings that transport info to various tissues
○ Sponges and placozoa lack them
● Composed of tissues & organs:
○ But, sponges and placozoa lack them
An organism that produced gametes in reproductive organs and develops from egg
through embryo to adult
What is an Invert?
● Any metazoan animal that lacks a backbone
● Any metazoan animal that is not within the Vertebrata clade
● Inverts are 97% of animal diversity
Metazoa (=animalia)
● Multicellular
● Heterotrophic
● Spermatozoa
● Neurotransmitters: RF-amide and acetylcholine
● Presence of protein kinase C for cell signaling
● Presence of special glycoproteins: collagens
● Monophyletic taxon, containing 35-40 phyla (changing #)
● About 1.3 million living species ( est. 2 to 100 million undescribed species )
Where Metazoa came from
● Molecular clock suggest plants and animals diverged ca. 1.6 billion years ago
Stromatolites
● Stromatolites form through the accretion of sediments by cyanobacteria (blue-green
algae)
● Once abundant in the Proterozoic, stromatolites are now rare and considered ‘living
fossils’
Phylum Concept
● Each body plan represents a phylum which can be defines as a group of species sharing
a common ancestry and unique assemblage of traits.
● 35-40 different phyla in the animal kingdom, 98% of all animals fall into 10 main ones
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Consumes food available in the environment ( doesn"t produce it"s own food; photo,chemo,etc) Able to actively move at some stage of lifestyle. Bundle of nerve endings that transport info to various tissues. An organism that produced gametes in reproductive organs and develops from egg through embryo to adult. Any metazoan animal that lacks a backbone. Any metazoan animal that is not within the vertebrata clade. Presence of protein kinase c for cell signaling. Monophyletic taxon, containing 35-40 phyla (changing #) About 1. 3 million living species ( est. Molecular clock suggest plants and animals diverged ca. Stromatolites form through the accretion of sediments by cyanobacteria (blue-green algae) Once abundant in the proterozoic, stromatolites are now rare and considered living fossils". Each body plan represents a phylum which can be defines as a group of species sharing a common ancestry and unique assemblage of traits. 35-40 different phyla in the animal kingdom, 98% of all animals fall into 10 main ones.
