According to the continental drift theory, which of the following land regions should show the greatest similarities in fossil types? (1 point)
A) east coast of South America and west coast of Africa
B) east coast of South and west coast of South America
C) northern coast of South America and southern coast of Eurasia
D) northern coast of Africa and southern coast of South America
Which abiotic factor is essential to all aquatic ecosystems except ocean hydrothermal vents, and why? (1 point)
A) phytoplankton, because it provides a source of food
B) salt, because it provides a source of minerals
C) deep water, because it provides the necessary environment for organisms to move about***
D) sunlight, because it provides a source of energy
A plant native to a desert in the Southwest U.S. is transplanted to the tundra region. The plant dies a few weeks after being moved. Which of the following factors in its new location could have been critical to its inability to survive the move? (1 point)
A) temperature***
B) amount of shade
C) water availability
D) carbon dioxide availability
Help please
what lesson is this called than i can help you
Biogeography
According to the continental drift theory, the land regions that should show the greatest similarities in fossil types would be the ones that were once connected before the continents separated. To determine the correct answer, we can refer to the theory and consider the possible land connections.
A) The east coast of South America and west coast of Africa were once connected as part of the supercontinent known as Pangaea. This land connection could have allowed species to migrate and similar fossils to be found on both coasts. So, A) east coast of South America and west coast of Africa is a valid possibility.
B) The east coast of South America and west coast of South America are part of the same continent and were never separated, so they would not show similarities in fossil types based on continental drift. B) east coast of South and west coast of South America is not the correct answer.
C) The northern coast of South America and southern coast of Eurasia were never connected as they are on different continents, so they would not have similar fossil types. C) northern coast of South America and southern coast of Eurasia is not the correct answer.
D) The northern coast of Africa and southern coast of South America were once connected as part of Pangaea. This land connection could have allowed species to migrate and similar fossils to be found on both coasts. Therefore, D) northern coast of Africa and southern coast of South America is a valid possibility.
To answer the next question:
The abiotic factor that is essential to all aquatic ecosystems except hydrothermal vents is sunlight, because it provides a source of energy. Sunlight drives photosynthesis in aquatic ecosystems, allowing plants and phytoplankton to produce food and support the rest of the food chain. Therefore, the correct answer is D) sunlight.
Finally, to address the last question:
When a plant native to a desert in the Southwest U.S. is transplanted to the tundra region, there can be several factors that contribute to its inability to survive. However, the critical factor in its new location could be temperature. Desert plants are adapted to the hot and arid conditions of the Southwest U.S., while the tundra region is characterized by cold temperatures. The extreme change in temperature could stress and ultimately cause the plant to die. Therefore, the correct answer is A) temperature.