Almost all of the major animal body plans seen today appeared in the fossil record over 500 million years ago at the beginning of the

#Question id: 10659

#Section 2: Evolution

Ecological and crude density of fish prey in related with predator. Water level is drop during the dry season and further increases in a rainy season. Following some observation effect are present on their density

 A) Ecological density is not change with respect to water level       

 B) Ecological density is gradually decrease with low water level

 C) Crude density increases over ecological density during low water level             

 D) Ecological density increases while crude density decreases during low water level

 E) There is no effect on crude density with seasonal water level

 Which of the following above observation is correct?

#Question id: 3371

#Section 2: Evolution

If a given gene in a randomly mating population has three alleles a, b and c in the ratio of 0.6, 0.3 and 0.1 respectively, what is the expected frequency of all heterozygote?

#Question id: 8911

#Section 2: Evolution

#Question id: 10747

#Section 1: Ecology

Extinction describes a loss of learning in _____________.

#Question id: 11181

#Section 4: Behavioural Ecology

Among populations of birds, individuals without territories are