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Science

Animal reproduction and growth

QuestionAnswer
Vertabrates Animals with backbones
Mammals Give birth to live young, produce milk, and have hair or fur
Invertebrates Animals without a backbone
Name three reasons zebras might fight with each other Over food, territory, leadership or to protect their young
How many species of animals could be living on earth 8 or 9 million species
What is the dominant form of reproduction in animals Sexual reproduction
What factors influence reproduction success? Genetic factors like a call that females prefer. Also the survival of the male offspring will depend on available food, protection from predators and weather conditions
Two ways for fertilization Internal and external
Examples of internal and external Internal-fertilization occurs inside the female body. External - the female lays eggs and the male fertilizes outside of the body.
Parental behaviors to ensure offspring survival Build nests, females nurse their young, hunters and gatherers.
Asexual reproduction One parent and it copies its genes to its offspring. Unless there is a mutation, an organism produced by asexual reproduction is genetically identical to its parent.
Reproductive success factors Different species of animals use different strategies to increase their chance of reproductive success strategies include trust and following one or both parents. Making sure offspring has food. And protecting against predators
What are courtship behaviors? These are attempts by animals to attract mates, mainly by males to convince females that they are worthy mates some animals vocalize to attract mate. The color of feathers on males attract females. male animals fight with other males to court females.
What environmental challenges might animals face? Predators, food supply, weather and disease
What are harmful environmental conditions? Weather-drought
A cow grows better than other cows when moved to a cooler climate Genetic or environmental GENETIC
calves are not growing well because of a parasite in the herd Genetic or environmental ENVIRONMENTAL
Created by: maria11c
 

 



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