Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 27446
TLS Online TPP Program

#Question id: 9234

What is a critical load?

#Unit 9. Diversity of Life Forms
  1. the amount of nutrient augmentation necessary to bring a depleted habitat back to its former level
  2. the level of a given toxin in an ecosystem that is lethal to 50 percent of the species present
  3. the amount of added nutrient that can be absorbed by plants without damaging ecosystem integrity

  4. the number of predators an ecosystem can support that effectively culls prey populations to healthy levels

More Questions
TLS Online TPP Program

#Question id: 7314

#Unit 5. Developmental Biology

With reference to plant flowering pattern; match the terms of Column I with the most appropriate term of Column II. (Se-Sepal; Ca-Carpel; St-stamen; Pe-Petal)

s.no.

Homeotic mutants

(Column 1)

S. No

Flower patterning

(Column 2)

A.     

Apetala2 mutant

                    I.  

Ca-Ca-Ca-Ca

B.      

Agamous /Apetala3 mutant

                    II.    

Se-Pe-Pe-Se

C.      

Agamous mutant

               III. 

Se-Se-Se-Se

D.     

Apetala2/Apetala3 mutant

                IV.

Ca-St-St-Ca

 
TLS Online TPP Program

#Question id: 7315

#Unit 5. Developmental Biology

Following pathway represents apoptosis in drosophila. Identify the proteins A-D sequentially.
TLS Online TPP Program

#Question id: 7316

#Unit 5. Developmental Biology

Programmed cell death, or apoptosis, is an essential part of animal development. In the nematode, with its invariant cell lineage, particular cell lineages or particular cells within specific lineages are destined to end in programmed cell death, and it was this feature that allowed the identification of the process and the analysis of its genetic control.

Which of the following combination of genes are correct?
TLS Online TPP Program

#Question id: 7700

#Unit 9. Diversity of Life Forms

The legless condition that is observed in several groups of extant reptiles is the result of ________.
TLS Online TPP Program

#Question id: 7703

#Unit 9. Diversity of Life Forms

Carolus Linnaeus believed that species remained fixed in the form in which they had been created. Linnaeus would have been uncomfortable with ________.
TLS Online TPP Program

#Question id: 7704

#Unit 9. Diversity of Life Forms

The best classification system is that which most closely ________.