December 3rd, 1967 was when a 53 yr old man recieved the first ever human heart transplant :P
Answer:
Passive immunity is the transfer of active humoral immunity of ready-made antibodies. Active immunity refers to the process of exposing the body to an antigen to generate an adaptive immune response.
Explanation:
Answer by YourHope:
Hi! :)
If a plant has xylem and phloem, then the plant is best described as
a vascular plant!
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The person has an increased risk for hypothermia.
Answer:
heart rate
Explanation:
The following lines from Frost's "The Road Not Taken" indicate what about the Speaker? Line 2: And sorry I could not travel both Line 3: And be one traveler long I stood A. The spaaker is waiting for someone TOT a long time ("long I stood"). B The speaker is traveling by himself- just "one traveler." C. The speaker is sorry he can't travel both roads