Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
5 Cards in this Set
- Front
- Back
|
Characteristics of Animals |
multi-cellular heterotrophic eukaryotes have tissues that develop from embryonic layers (there are exceptions) |
|
|
Heterotroph |
organism that has to ingest its food |
|
|
Cell structures and specialization in animals |
• Animals are multicellular eukaryotes • Their cells lack cell walls • Their bodies are held together by structural proteins such as collagen • Nervous tissue and muscle tissue are unique,defining characteristics of animals |
|
|
animal reproduction |
Most animals reproduce sexually, with the diploidstage usually dominating the life cycle |
|
|
development
|
After a sperm fertilizes an egg, the zygoteundergoes rapid cell division called cleavage • Cleavage leads to formation of a multicellular,hollow blastula • The blastula undergoes gastrulation, forming agastrula with different layers of embryonic tissue |
