As baleen whale number increase in the antarctic the seal population decreases.These is because baleen whale is predictor to seal while sea is the prey. An increase in number of baleen whale led to decrease of number of seal since more seal will be required to feed the baleen whale.
Which phrase best describes scientific theories?
a.explain few observations
b.serve as speculations
c.are never proven
d. cannot be replaced
Biology
Answer:
The correct answer is option C. "2+".
Explanation:
A common procedure to test for the presence of antigens is to perform an agglutination reaction by performing an antibody screen. In an agglutination reaction that is graded 2+ the red blood cells start to be broken and medium-sized agglutinates are formed. In this reaction no red blood cells are free, only agglutinates are seen at the bottom of the microtubes. The characteristics of the reaction herein described concur with an agglutination reaction that is graded 2+.