In intestinal lumen epithelial cells, which of the following occurs by passive transport?

a. import of Na+ on the apical side    

b. export of Na+ on the basal side

c. import of glucose on the apical side           

d. export of glucose on the basal side

#Question id: 10635

#Unit 10. Ecological Principles

Three important biological parameters – generation time, per capita growth rate (r) and clutch size are a function of the organism‟s body size. Which of the curves (a) or (b) represents the correct relation of each of the parameters to body size?

#Question id: 10636

#Unit 10. Ecological Principles

The demographic transition model depicts demographic changes from high- to low-level births and deaths in five stages

Stage 1 is characterized by total population numbers are low and the high birth rate is balanced by the high death rate.

B) Stage 2 is characterized by high population growth rate is results of high birth rate however, decline death rate

C) Stage 4 is characterized by decline in the proportion of the population in the reproductive age group and these changes stabilizes population size

D) Stage 3 is characterized by falling birth rates and death rates and population growth rate is zero due to the less numbers of people in the reproductive age group

#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?