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5 Cards in this Set

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ANIMAL PHYLA WITH MICROLECITHAL EGGS
Echinodermata
MICROLECITHAL EGGS
(AMOUNT & DISTRIBUTION OF YOLK)
- Small amount of yolk granules
- Evenly distributed throughout yolk ooplasm
STARFISH
"REPRODUCTIVE-DEVELOPMENTAL STRATEGY"
Oviparous
External fertilization and development
Development is completely independent of parents
- aqueous environment
- Egg envelopes are minimal
CLEAVAGE CHARACTERISTICS OF MICROLECITHAL EGGS
Holoblastic Cleavage
TYPES OF HOLOBLASTIC CLEAVAGE
Radial- cut it any which way and it will still be equal

Equal- each cleavage division is equal. No macromeres or micromeres.