noonelikesu
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please click on the images to know the question, it's only 4 marks so it doesn't need a lot, thank you
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noonelikesu
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macpatgh-Sheldon
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Hi,

This is a question testing your knowledge of evolution by natural selection - don't get sidetracked by the strange bird.

Due to immense variation in nature, different birds of this species would have different shapes and lengths of bills. A mutation in one of the genes that determines the length of the bill could result in birds with short, hence uncrossed bills. Such birds would be slow at eating seeds, and hence would be at a disadvantage compared to birds with longer crossed bills. The former would gradually die earlier and produce less offspring, and eventually would be wiped out by natural selection i.e. the birds with crossed bills would pass on their "good" genes to their chicks. Over time, the vast majority of crossbill birds would have longer crossed bills = evolution.
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noonelikesu
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(Original post by macpatgh-Sheldon)
Hi,

This is a question testing your knowledge of evolution by natural selection - don't get sidetracked by the strange bird.

Due to immense variation in nature, different birds of this species would have different shapes and lengths of bills. A mutation in one of the genes that determines the length of the bill could result in birds with short, hence uncrossed bills. Such birds would be slow at eating seeds, and hence would be at a disadvantage compared to birds with longer crossed bills. The former would gradually die earlier and produce less offspring, and eventually would be wiped out by natural selection i.e. the birds with crossed bills would pass on their "good" genes to their chicks. Over time, the vast majority of crossbill birds would have longer crossed bills = evolution.
if I could, I would kiss you over the screen rn. thank you so much
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