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SCIENCE - ANIMAL REP

SCIENCE - ANIMAL REPRODUCTION (1)

QuestionAnswer
What is the scientific name for sponges? porifera
How do sponges feed? Filter feeding by water running through it
How do sperm get from one sponge to another? by water, filter feeding
Where does a sponge fertilize an egg? in the water
What does a fertilized egg develop into? embryo
What is a larva? an immature form of an animal that looks very different from the adult
What are cnidarians? simple sea animal with stings -
Name three examples of cnidarians. jellyfish, corals, sea anomes
What is a name given to the adult body shape of a cnidarian? polyp & medusa
What is the name of the immature body shape? larva
What is external fertilization? a male organism's sperm fertilizing a female organism's egg outside of the female's body.
Name two reasons why external fertilization must occur in water. to prevent eggs and sperm from drying out and water carries sperm to egg
What is a gestation period? the period between fertilization and birth
Why are the eggs of fishes able to develop outside the body of the female? water carries sperm to egg so the egg can develop
What would happen to fish eggs if they were laid on land? eggs would dry out and die
Which two groups of vertebrates produce shelled eggs? reptiles and birds
Why is the shelled egg important? shell protects eggs and stores food for embryo
In egg-retaining animals, where does th embryo's nourishment come from? fluids inside the eggs that surround the embryo
What is the placenta? an organ in the reproductive process that exchanges materials/nutrients between the mother and the embryo
What materials move into the embryo? blood, food, oxygen
What materials move out of the embryo? waste, carbon dioxide
What is metamorphosis? major body changes as an animal develops from a young organism to an adult
What is complete metamorphosis? four stages: egg, larva, pupa, adult
What is incomplete metamorphosis? three stages: egg, nymph, and adult.
_________________________________reproduction requires one parent organism. asexual
Most vertebrates and most invertebrates reproduce __________________________________. sexually
Sponges reproduce asexually when a new sponge grows from a parent and breaks off in a process called ____________________ budding
_____________________________________ may occur either inside or outside the female organism's body. fertilization
External fertilization usually occurs in _______________ so that the eggs and sperm cells do not dry out. water
Sexual reproduction requires a ________________ mate
Offspring from___________________reproduction have different DNA than the parents. sexual
A ___________________ is a cnidarian body form that looks like and open umbrella. medusa
_______________________ fertilization occurs inside the female organism's body. internal
The length of time between fertilization and birth is call the ________________________ period. gestation
_______________________ stage is not a part of incomplete metamorphosis? larva
The stage at which a young insect is enclosed in a protective covering is_______________________ pupa
What stage of life does a frog spend partly on land? adult
Which types of animals provide parental care for their young? birds
The organ through which materials pass between the mother and the embryo is called the ________________________ placenta
The larva stage of a frog is called _____________________ pupa
Complete metamorphosis does not include a ____________ stage. larva
_________________________ provide parental care to their young until they are independent. mammals
Most crustaceans begin life as tiny swimming larva
___________________ are eggs kept outside a parent's body. amniotic eggs
Created by: belinda71263
 

 



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