#Question id: 5376
#General Aptitude
There are two classes A and B consisting of 40 and 52 student respectively . If the average of weight of class A is 45kg and that of class B is 40kg.Find the average of weight of all the student of class A and B.
#Question id: 12264
#Section 2: Evolution
#Question id: 10656
#Section 2: Evolution
Which of the following is an incorrect statement about the regulation of populations?
A) The logistic equation reflects the effect of density independent factors, which can ultimately stabilize populations around the carrying capacity.
B) Density-independent factors have an increasingly greater effect as a population’s density increases.
C) High densities in a population may cause physiological changes that inhibit reproduction.
D) Because of the overlapping nature of population-regulating factors, it is often difficult to precisely determine their cause-and-effect relationships.
#Question id: 4615
#Section 2: Evolution
Currently, two of the living elephant species (X and Y) are placed in the genus Loxodonta, and a third surviving species (Z) is placed in the genus Elephas. Assuming this classification reflects evolutionary relatedness, which of the following is the most accurate phylogenetic tree?
#Question id: 9192
#Section 2: Evolution
The oak tree pathogen Phytophthora ramorum has migrated 650 km in ten years. West Nile virus spread from New York State to 46 others states in five years. The difference in the rate of spread is probably related to