A telegraph uses an electric circuit to send a message. When the telegraph operator presses on the device, the circuit switch is on, and when the device is released, the circuit is turned off. How is the technology to send a telegraph like modern digital technology?
The telegraph sends information as a continuous wave.

The telegraph uses the standard alphabet to send information.

The telegraph sends information as a series of pulses.

The telegraph uses sound waves to transfer information.

Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.

What is one limitation of the myplate guidelines

Which of the following is characteristic of the lytic cycle? a) viral dna is incorporated into the host genome.b) the viral genome replicates without destroying the host.c) a large number of phages are released at a time.d) the virus—host relationship usually lasts for generations.