What is the key concept addressed by the question?
What will be an ideal response?
The question asks about different types of signaling.
You might also like to view...
In a stratified lake, the warmer and less dense layer is called the
A) epilimnion. B) hypolimnion. C) hyperlimnion. D) thermocline.
In polymerase chain reaction technology, the two strands of DNA are separated by:
a. gel electrophoresis. b. treating them with restriction enzymes. c. centrifugation. d. exposing them to high pH. e. heating them.
Which of the following statements regarding viral diseases is false?
A) RNA viruses tend to have an unusually high rate of mutation because their RNA genomes cannot be corrected by proofreading. B) New viral diseases often emerge when a virus infects a new host species. C) Very few new human diseases have originated in other animals because the genetic differences are too great. D) AIDS was around for decades before becoming a widespread epidemic.
During the 1950s, a scientist named Lysenko tried to solve the food shortages in the Soviet Union by breeding wheat that could grow in Siberia. He theorized that if individual wheat plants were exposed to cold, they would develop additional cold
tolerance and pass it to their offspring. Based on the ideas of artificial and natural selection, do you think this project worked as planned? A) Yes; the wheat probably evolved better cold tolerance over time through inheritance of characteristics the individuals gained during their lifetime. B) No, because Lysenko took his wheat seeds straight to Siberia instead of exposing them incrementally to cold. C) No, because there was no process of selection based on inherited traits. Lysenko assumed that exposure could induce a plant to develop additional cold tolerance and that this tolerance would be passed to the plant's offspring. D) Yes, because this is generally the method used by plant breeders to develop new crops.