primary disruptions could be signaling the plant that a change in environmental conditions has occurred and that it’s time to respond by altering existing pathways or by activating stress-response pathways. At least five different types of stress-sensing mechanisms can be distinguished:

COLUMN I	COLUMN II
A) Physical sensing	i) usually results from the detection of by-products that accumulate in cells due to the uncoupling of enzymatic or electron transfer reactions, such as the accumulation of ROS during stress caused by too much light.
B) Biophysical sensing	ii) often involves the presence of specialized proteins that have evolved to sense a particular stress; for example, calcium channels that can sense changes in temperature and alter Ca2+ homeostasis.
C) Metabolic sensing	iii) refers to modifications of DNA or RNA structure that do not alter genetic sequences, such as the changes in chromatin that occur during temperature stress.
D) Biochemical sensing	iv) refers to the mechanical effects of stress on the plant or cell structure, for example, the contraction of the plasma membrane from the cell wall during drought stress.
E) Epigenetic sensing	v) might involve changes in protein structure or enzymatic activity, such as the inhibition of different enzymes during heat stress.

 

  

Match the correct sequence sensing mechanism during in stress;

#Question id: 10724

#Unit 10. Ecological Principles

This example is based on the hypothetical ( x means Present), compare species diversity within different community Which one of the

following conclusions is most appropriate based on the above observations?

A) The beta diversity between the community X and Y is 5

B) The gamma diversity for the these communities are 14

C) The beta diversity between the community X and Z is greater than Y and Z

D) Community Y has minimum Alpha diversity among community

#Question id: 10725

#Unit 10. Ecological Principles

While studying the diversity of 3 communities, 5 species and 50 individuals were recorded from each community. The number of individuals under each species was listed as mentioned in the following Table.  

Which of the following is decreasing order of evenness of community?

#Question id: 10726

#Unit 10. Ecological Principles

Which of the following habitat is most diversify?

Based on the above following conclusions: observations, the ecologist draws

A. Plant communities H3 and H4 show similar value of evenness

B. Plant communities H4 is more diverse than H3

C. Plant community H1 is least diverse among other community

D. Plant community H3 is most diverse

Which of the following statements is correct regarding above conclusions?

#Question id: 10727

#Unit 10. Ecological Principles

The following table shows the number of individuals of each species found in two communities

The calculated evenness values for communities C1 and C2, respectively are

#Question id: 10728

#Unit 10. Ecological Principles

Following table shows the number of individuals of different species in two communities, X and Y. Use Jaccard index determine the degree of similarity between X and Y community? 

#Question id: 10729

#Unit 10. Ecological Principles

Researcher study the diversity community was shown in table, the relative abundance of each species at different community?