Select the Ocean Basemap (Esri) from the Basemap drop-down menu at the top right. Also select the Regional Bathymetric Contours from the Options drop-down menu. Locate the divergent boundary that runs between the continents of South America and Africa. This boundary is known as the Mid-Atlantic Ridge. Explore this boundary in the location where the two continents are closest, and zoom in until you can easily read the contour lines on the topographic map. Note that the numbers on the contour lines represent the depth of the ocean floor and are always positive. For example, 7,000 meters is deeper than 3,000 meters. Place your cursor or mouse in various locations along the plate boundary, and read the elevation in the map key at the bottom left. The elevation numbers can be negative, unlike the contour lines, so they will become more negative as the sea floor becomes deeper.

Gather information along this boundary and describe how the divergent motion of theses tectonic plates has shaped Earth’s features along this boundary. Provide evidence to support your answer.

Here is the link to the website: https://www. ncei. noaa. gov/maps/hazards/

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.

Adrought killed all the plants in an agricultural farmland. gradually, due to wind and some birds for. nearby areas, new plants started sprouting l. what stage of succession was taking place in the farmland? a) competition b) nudation c) ecesis d) reaction e) migration

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.