AS Biology Papers 1 and 2 - Edexcel A

Biology

Topics 1,2,3,4

Sample Data

Front Define Artificial Insemination.
Back Sperm is collected from the males and stored cyrogenically(in very cold conditions)It is injcted into the cervix of a female to impregnate them without the need for sexual intercourseOften used in captive breeding programmes.
Front What happens after the sperm and egg cell nuclei fuse?
Back 1. They form a zygote.2. A zygote has 46 chromosomes, and it continues to divide by mitosis to produce more and more.3. They continue to divide like this until an embryo is formed.
Front What is the aim of conservation?
Back Prevent extinction of a speciesIncrease population sizeIncrease genetic diversityIncrease species richnessPrevent habitat loss
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