--------- is a biological plastic and non-fibrous material. It occurs only in mature cell walls and is made of an insoluble hydrophobic aromatic polymer of phenolic alcohols.

#Question id: 10637

#Unit 10. Ecological Principles

Which of the following graph represent logistic growth pattern and exponential growth respectively? 

#Question id: 10638

#Unit 10. Ecological Principles

Following some statement is given

A- Mortality rate constant over age group 

B- Greater proportional survival at older age

C. Follow type III survivorship curve

D. Follow type II survivorship curve

Which of the following above statement is correct?

#Question id: 10639

#Unit 10. Ecological Principles

The schematic below shows the relationship between survivorship with age (relative to maximum lifespan) in Species 1 (dashed line) and Species 2 (solid line). Which of the following inferences is compatible with this figure?

A) Species 1 follow type I survival ship curve

 B) Species 2 follow type III survival ship curve

 C) Species 1 show parental care of offspring

 D) Species 2 showed large size of offspring than species 1

#Question id: 10640

#Unit 10. Ecological Principles

Given below is a graphical representation of plant life histories based on Grime's model in which disturbance and competition are the important factors

Which of the following options correctly represents A, B and C, respectively in the figure above?

#Question id: 10641

#Unit 10. Ecological Principles

The size of the population (N) is estimated as follows, what is parameter of M, S and R respectively? 

#Question id: 10642

#Unit 10. Ecological Principles

Which curve best describes survivorship in a songbirds and marine crustacean that molts respectively?