biology_animals_2025_01_21_202110 Flashcards
(21 cards)
Endoderm Layer
Internal Layer consisting of Lung Cells, Thyroid cells, Digestive cells
Mesoderm Layer
The Middle Layer consists of Cardiac muscle cells, skeletal muscle cells, Tubule kidney cells, Red blood cells, Smooth gut muscle cells
Ectoderm
The external Layer consists of Skin cells of the epidermis, Neuron in the brain, Pigmen cells
Morula
A fertilized egg dividing in early development
Blastula
A hollow sphere of single-layer cells surrounding a field cavity
Gasturla
Embryo undergoes Gastrulation forming the 3 layers (Ectoderm, mesoderm and endoderm) eventually develop into tissue & Organ
Coelomate
A fluid-filled body cavity lined up with mesodermal tissue.(Sleeping bag)
Humans and earthworms
Pseudocoelomate
The cavity partly lined up with the mesodermal layer. (Sleeping bag with holes)
Acoelomate
No body cavity. All organs are packed into a body unorganized.
Packed like a stuffed toy
Bilateral Symmetry
Divided into 2 equally
Radial Symmetry
Pie shaped equally dividable from center
Asymmetry
Random Unever no symmetry
EndoSkeleton
Internal bone or cartilage skeleton provide protection & structural support
Humans, Other vertebrates
ExoSkeleton
External, Chitin or Calcium Carbonate. Provides protection & support.
Crabs, insects.
Parthenogenesis
Asexual reproduction with an unfertilized egg. No genetic variation
Do plant cells Mirgrate
No, plant cells do not migrate
what does meiosis produce in plants
Meiosis in plants produces spores
Do plants and animals have similar life cycles
No plants have both diploid and multicellular haploid stages, animals only have Diploid
Are germ cells set aside early in plant development
No, plant germ cells are not set aside early while animal germ cells are
Do plants have extended morphogenesis
Yes
extended morphogenesis - longer flexible development
Do plants have more or less developmental plasticity than animals
Plants have more developmental plasticity
Developmental Plasticity - adaptable to its environment during development