Structures that are _________ to each other are similar in function.
Fill in the blank(s) with the appropriate word(s).
Ans: Analogous
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Which of the following correctly lists the components necessary for prokaryotic and eukaryotic transcription?
A. RNA polymerase, general transcription factors, DNA, and RNA nucleotides B. RNA polymerase, general transcription factors, DNA and DNA nucleotides C. ribosomes, general transcription factors, DNA and DNA nucleotides D. ribosomes, general transcription factors, DNA and RNA nucleotides
Explain how the incubation period can influence the spread of an infectious agent
A. An infectious carrier will only spread the illness when they are showing acute symptoms. As such, the length of incubation period is not important for spreading the illness. B. Depending on the microbe and the illness, an asymptomatic carrier in the incubation period might be shedding infectious microbes to his/her surroundings. In such a case, a longer incubation period would lead to a greater spread of the disease as the carrier comes into contact with more individuals while he/she is generally appearing to be healthy. C. A very short incubation period will place a patient into the highly infectious active disease state sooner. Since people avoid contact with actively ill individuals, a very short incubation period will always lead to a DECREASE in the spread of an infectious disease. D. A very long incubation period will place a patient into the highly infectious active disease state later. Since people generally avoid contact with actively ill individuals, a very long incubation period will always lead to a DECREASE in the spread of an infectious disease.
Answer the following statements true (T) or false (F)
1. More conservation spending has led to greater recovery of black rhinoceros numbers. 2. The United States contains at least one biodiversity hot spot. 3. The passenger pigeon went extinct due to an introduced parasite. 4. The number of extinctions of birds and mammals has gone up as human populations have increased. 5. The introduction of avian malaria to Hawaii was responsible for the extinction of almost half of Hawaii's native birds.
If the recombination frequency between two genes is close to 50%, what could be true about the location of the two genes? (Select all that apply.)
A) They are on nonhomologous chromosomes. B) They are far apart on the same chromosome. C) They are very close together on the same chromosome. D) None of the choices could be true.