what defines animals
are animals mostly haploid or diploid for most of their life?
diploid
if an organism can only be split into equal halves one way, what symmetry is that`
bilateral symmetry
what is the process called where a single cell divides to produce two genetically identical cells
mitosis
which group has no true tissues
porifera
whats the term for maintaining a stable internal environment
homeostasis
what key structure do plants and fungi have that animals lack
a cell wall
animals with only two embryonic tissue layers are called what
diploblastic
during which stage of mitosis to chromosomes line up in the middle of the cell
metaphase
cnidaria
which system uses hormones to send slower, longer lasting signal
endocrine system
what genes act as the master blueprint, controlling body structure during development
hox genes
which embryonic layer forms muscles and many internal organs
mesoderm
what structure forms to pull sister chromatids apart during cell division
mitotic spindle (spindle fibres)
which group has jointed appendages and is the most diverse on earth
arthropods
which system sends rapid electrical signals for quick responses
nervous system
Animals can't produce their own food - what type of nutrition do they use?
Heterotrophy
what is the fluid filled cavity that cushions internal organs called
coelom
what small circular DNA molecules are often found in bacteria and can carry antibiotic resistance genes?
plasmids
which group is characterized by having a lophophore or trochophore larva?
lophotrochozoa
what do you call animals that generate their own body heat internally
endotherms
a larval stage
what are the two main developmental pathways animals follow as embryos (think branch 3 in phylogenetic tree looked at in week 6)
Protosomes and Deuterostomes
some bacteria can survive extreme conditions by forming tough dormany structures, what are these called
endospores
what do you call animals that grow by shedding their outer layer
ecdysozoa (molting animals)
whats the term for balancing energy intake with energy use
energy budget