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DENIUS [597]
3 years ago
6

5. The cells that function with the sieve tubes are the

Biology
1 answer:
Zinaida [17]3 years ago
6 0

Answer:

companion cells

Explanation:

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How does a hypothesis become a theory
Elan Coil [88]
  A "hypothesis" is just an idea or proposal which someone comes up with to try and explain a given set of observations. A hypothesis must be:
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b) testable
 c) have predictive value, in order to be taken seriously by scientists, and to begin its journey towards the status of "theory".
If it is an interesting proposal and is deemed to possess these 3 criterion, scientists will start to investigate it: what can it predict, what does it explain, is it compatible with all the relevant data/observations? If it is supported by enough experiments and/or observations, and gains acceptance by enough of the "scientific establishment" (ie, by enough scientists who are accepted and admired by their peers), at some undefinable point it becomes a "theory". It can still be disproven at any time, but until that happens it will remain a "theory" and may even graduate to the status of "well supported theory", such as the theory of gravity or relativity. At NO point, however, is ANY theory ever considered by scientists to have been "proven": in the scientific world, all truth is "relative". and provisional.
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4 years ago
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In corn, smooth kernels (K) are dominant to wrinkled kernels (k). A farmer crosses two corn plants that are heterozygous for ker
ioda

Answer:

75% will have smooth kernels

Explanation  

3 out of 4 of the offspring will have the dominant trait of smooth kernels. So, 75%.                                              

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3 years ago
Which of the following are considered fossil fuels? Select the three correct answers. (1 point)
Tomtit [17]
Natural gas, coal, oil
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Harvey takes the drug viagra. how does the drug help produce erections for harvey?​
Ne4ueva [31]
The answer to this question would be: B<span>. It relaxes blood vessels in Harvey’s penis, allowing them to expand. 
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Viagra active component is sildenafil citrate which has the ability to relax the smooth muscle in the artery and dilate the arteries of the penis. As the arteries in penis dilate, the blood flow into penis will be increased. This will make penis filled with blood and give pressure to nearby veins causing them to close. All this event cause increased pressure in penis that was making the erection
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