Question

1. which of the following is not a source of methane emissions? a. landfills b. solar energy production c. rice paddies d. livestock digestion 24. which statement is true about the dna in eukaryotic cells compared to prokaryotic cells? a. prokaryotic dna is found in membrane - bound organelles, while eukaryotic dna is not. b. eukaryotic dna is enclosed within a nucleus, while prokaryotic dna is located in the nucleoid region. c. eukaryotic dna is single - stranded, while prokaryotic dna is double - stranded. d. eukaryotic dna is circular, while prokaryotic dna is linear. 25. what is the process by which organisms gradually change over time? a. adaptation b. natural selection c. evolution d. inheritance

Explanation:

• For question 23: Landfills, rice paddies, and livestock digestion produce methane. Solar energy production is a clean - energy source and does not emit methane.
• For question 24: In eukaryotic cells, DNA is enclosed in a nucleus, while prokaryotic DNA is in the nucleoid region. Prokaryotic DNA is not in membrane - bound organelles, both eukaryotic and prokaryotic DNA are double - stranded, and eukaryotic DNA is linear while prokaryotic DNA is often circular.
• For question 25: Evolution is the process by which organisms gradually change over time. Adaptation is a result of natural selection, natural selection is a mechanism of evolution, and inheritance is the passing on of traits from parents to offspring.

Answer:

1. B. Solar energy production
2. B. Eukaryotic DNA is enclosed within a nucleus, while prokaryotic DNA is located in the nucleoid region.
3. C. Evolution