18. Read the following statements: a. Photosynthesis removes CO2 from the atmosp

Question

18. Read the following statements: a. Photosynthesis removes CO2 from the atmosphere b. Deforestation adds CO, to the atmosphere. c. Ani d. Pri mals remove CO, from the atmosphere through respiration. mary consumers gain carbon from consumption of primary e. Humans only contribute to the carbon cycle by the burning of fossil fuels How many of the above statements are true with regard to the carbon eyele? A) I B) 2 C) 3 D) 4 E) 5 Use the following information for the next question. The illustrations below show the age and sex of the human populations in Country I and Country 2. The ages are grouped by 5-year classes, and the sexes are represented separately. The percentages in the different age classes are shown by the relative widths of successive horizontal bars. 19. If Country I wanted to make its growth rate more similar to that of Country 2, which of the Country Country Age 5-79 male074 alefollowing would help it achieve that goal? Male A) A reduction in the birth rate in Country 1. B) A decrease in the infant mortality rate in Country 1. C) Medicinal advances that increase the survivorship of people over the age of 45 D) All of the above. E) A & C only 60-64 53-39 50-34 40-44 30-34 20-24 15-19 10-14 5-9 0-4 Percent Percent 20. Which of the statements below are true about exotic and invasive species? A) Invasive species are species that occur outside their native ranges, while exotic species occur within their native ranges B) Both exotic and invasive species have been introduced to a new range. C) Only invasive species spread and increase in abundance rapidly. D) All exotic species are always invasive. E) Both B &C; are true.

Explanation / Answer

18.the answer is option c that is 3.the correct options are photosynthesis removes CO2,deforestation adds CO2 and primary consumer gains carbon from primary producers.

19.the correct answer is option E which consists option A and option C

20.the correct answer is option B.

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