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L3: There (past/present/future)
+ positive sentence - negative sentence ? question
Terms in this set (18)
There was a test last week.
+ test last week
Is there a test everyday?
? test everyday
There is a test everyday.
+ test everyday
There were tests last week.
+ tests last week
Will there be any tests next week?
? tests next week
There are tests everyday.
+ tests everyday
There will be tests next week.
+ tests next week
There wasn't a test last week.
- test last week
There isn't a test everyday.
- test everyday
There won't be a test next week.
- test next week
Will there be a test next week?
? test next week
Was there a test last week?
? test last week
There weren't any tests last week.
- tests last week
There aren't tests everyday.
- tests everyday
There won't be any tests next week.
- tests next week
Were there any tests last week?
? tests last week
There will be a test next week.
+ test next week
Are there tests everyday?
? tests everyday
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Types of Sentences/Mistakes
The Mysterious Mind
Describe the process of alternation of generations. Explain its significance.
Polymerase Chain Reaction (PCR) is a biochemical technique that allows scientists to take tiny samples of DNA and amplify them into large samples that can then be examined to determine the DNA sequence. (This is useful, for example, in forensic science.) The process works by mixing the sample with appropriate enzymes and then heating it until the DNA double helix separates into two individual strands. The enzymes then copy each strand, and once the sample is cooled the number of DNA molecules will have doubled. By repeatedly performing this heating and cooling process, the number of DNA molecules continues to double every temperature cycle (referred to as a PCR cycle). Suppose a sample containing x molecules is collected from a crime scene and is amplified by PCR. Express the number of DNA molecules as a function of the number n of PCR cycles.
Which characteristic of life is shown when you squint in bright light? A. growth and development, B. reproduction, C. organization, D. responses.
The outermost electron orbits of the noble gases all have (a) one electron (b) two electrons (c) seven electrons (d) the maximum number of electrons
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