Question

38. What is the significance of evolutionary biology to the treatment of disease with antibiotics?
A. An understanding that, as patients die, the human genome evolves resistance, has led evolutionary biologists to intentionally spread illnesses.
B. An understanding of evolution has led to new and effective treatments of incurable diseases, such as tuberculosis.
C. Evolutionary biologists came up with drugs called protease inhibitors, which are used to treat HIV.
D. An understanding of evolution provides insight into the origin, spread, and dangers of antibiotic resistance in human pathogens.
E. Evolution is not significant to medicine.

40. Which statements about the carbon dioxide now being released when we burn fossil fuels, is supported by scientific evidence?

A) The carbon was fixed by photosynthesis, hundreds of millions of years ago.

B) Most likely, the climate of the Earth will change or is already changing, as a result of its presence in the atmosphere.

C) Once released, anthropogenic carbon dioxide enters food webs and cycles through the biosphere.

D) A and B

E) All of the above

49. Which of the following statements is essentially correct?

A. In humans, sex chromosomes determine biological sex

B. Sex chromosomes determine gender

C. Sex chromosomes determine sexual orientation

D. The genes for external genitalia are on the sex chromosomes.
E.   All of the above

50. Which of the following phenomenon makes coexistence of two competing species more likely?

A. Interference competition

B. Competitive exclusion

C. Resource partitioning

D. None of the above

51. Which types of species would you expect to see early in ecological succession?
A. Good dispersers with broad ecological tolerances.
B. Mutualists and specialized pathogens.

C. Good competitors with high intraspecific competitive ability.
D. Large predators

E. None of the above

52. Which of the following is both a predator and a keystone species?

A) Pisaster sea stars
B) California sea otters
C) Orcas
D) A and B
E) All of the above

53) Which of the following’s statements about the cycling of Nitrogen in the biosphere are essentially correct?

A) The atmosphere is the most important nonliving reservoir of Nitrogen.

B) Changes in the concentration of atmospheric Nitrogen exhibit a profound effect on the climate.
C) Nitrogen fixation is limited to a few species of organisms, including members of the genus Rhizobium, Anabaena, and Bradyrhyzobium.
D) A and C
E) All of the above.

PLZ ANSWER THEM ALL NO EXPLAINATION REQUIRED

Answer 1

Ans-38- D- An understanding of evolution provides insight into the origin, spread, and dangers of antibiotic resistance in human pathogens.

40- E - all of the above

49 - E - All of the above

50 C - Resource partitioning

51- A - good disperser with broad ecological tolerance

52- D -A and B

53- D - A and C