Which statement describes the pattern in the density of gases in the
atmosphere?
A. They are...
Biology, 24.10.2020 02:20 lydia1melton
Which statement describes the pattern in the density of gases in the
atmosphere?
A. They are least dense in the atmosphere near sea level.
B. They are evenly dense throughout the atmosphere.
c. They are less dense near the top of the atmosphere.
D. They are densest near the middle of the atmosphere.
Answers: 2
Biology, 22.06.2019 03:00
To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.
Answers: 1
Biology, 22.06.2019 06:10
You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13
Answers: 2
Biology, 22.06.2019 09:00
Suppose you could go back in time to interview henri becquerel on the day he discovered radioactivity. from his perspective, write an account of the discovery.
Answers: 2
Biology, 22.06.2019 14:00
Which diagram best represents the chromosomes that would be found in a two new skin cells produced as a result of this process?
Answers: 1
Mathematics, 16.10.2019 03:30
Mathematics, 16.10.2019 03:30
English, 16.10.2019 03:30
Biology, 16.10.2019 03:30
Mathematics, 16.10.2019 03:30
English, 16.10.2019 03:30
Mathematics, 16.10.2019 03:30
Mathematics, 16.10.2019 03:30
Mathematics, 16.10.2019 03:30
Mathematics, 16.10.2019 03:30
Mathematics, 16.10.2019 03:30