Biology, 11.11.2020 19:20 alexcuevaz90
The graph below shows the salmon population, in thousands of pounds, in the Columbia River, from 1866 to 1983. The graph below shows the salmon population, in thousands of pounds, in the Columbia River, from 1866 to 1983. Salmon populations increase between 1866 and 1879, then fluctuate at a steady rate between 1879 and 1931. From 1931-1983, the salmon population steadily decreases. Based on the graph, which of these conclusions is most likely correct? Question options: A large amount of contaminants were present in the river between 1910 and 1912. A series of large hydropower units were built on the river after 1931. The salmon did not breed between 1866 and 1879. The hydropower units on the river were deactivated after 1970.
Answers: 3
Biology, 22.06.2019 01:30
Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.
Answers: 1
Biology, 22.06.2019 08:00
Pls in your opinion, what are the limiting factors that might affect the growth or diversity of our ecosystem? respond to this question in claim, evidence, reasoning format. 1. make your claim (i are the limiting factors that might affect the growth or diversity of our 2. follow the claim with 3 pieces of evidence. evidence may be taken from the reading, the videos, previous lessons, or googled answers. site sources, too. 3. use reasoning to explain why you chose your evidence.
Answers: 3
Biology, 22.06.2019 12:50
The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above
Answers: 1
The graph below shows the salmon population, in thousands of pounds, in the Columbia River, from 186...
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