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Home >All Categories > Science & Mathematics >Physics >Open QuestionIf you need multiple photons to perform the delayed choice quantum mechanics experiment, are we really detecting a choice of just one photon? If it's a choice of multiple different photons we are measuring, than it really is not a delayed choice for that first photon fired?Answer Question

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Natural selection does not

make species stronger over time.

select what a species needs.

cause changes in a population.

increase how often favorable traits are passed on.

Fossils can help us

predict the future

prepare for changes in the environment

respond to changes in the environment

learn how species have changed

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natural variation
survival of the fittest
natural selection
struggle for existence.

Pretty sure its natural variation but not positive.

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Sorry, I could not read the content fromt this page.

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Help! Can anyone find the answers online for me? I'd LOVE to spend time with family now rather than spending forever filling out these multiple choice questions for only 5 points! Is anyone good at searching the depths of the internet??
The questions begin like this:
1. Which of the following plant groups was the earliest to appear on land? (a. conifers, b. seedless vascular plants, c. gymnosperms, d. angiosperms, e. bryophytes)
2. Which of the following was an adaptation that made land life possible for plants?

The top of the page says AP Biology Practice Exam 2 and the page number looks like is 309 and goes until 319.

Please help!!

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