Following statements regarding to the classes of genes that regulate floral development:

A.  Floral organ identity genes directly control floral identity. The proteins encoded by these genes are transcription factors that likely control the expression of other genes whose products are involved in the formation and/or function of floral organs.

B.  Cadastral genes act as spatial regulators of the floral organ identity genes by setting boundaries for their expression.

C.   Meristem identity genes are necessary for the initial induction of the organ identity genes. These genes are the positive regulators of floral organ identity.

D.  Cadastral genes act as negative regulators of the floral organ identity genes by inhibits their expression.

E.   Meristem identity genes are the negative regulators of floral organ identity genes.

Which of the above statements are true?

#Question id: 10595

#Unit 10. Ecological Principles

If the per capita birth rate (b) and per capita death rate (d) in one year is 0.80 and 0.20 respectively. if the initial population size is 600, what will be net change (dN) in population size in one year

#Question id: 10596

#Unit 10. Ecological Principles

In a experimental population the birth rate is 18 per 1000 and death rate is 14 per 1000. Size of population is 10,000 at time t then what will be size of population at time t+1?

#Question id: 10599

#Unit 10. Ecological Principles

In a type I survivorship curve characterized by:

#Question id: 10600

#Unit 10. Ecological Principles

Which of the following is not feature of Type II survivorship curve?

#Question id: 10601

#Unit 10. Ecological Principles

following some statement are given about Grime’s triangle that is alternative to r and K selection is correct?

A. Ruderals are adapted to take advantage of habitat disturbance, but these are less competitor 

B. Any species cannot be a good stress tolerator and a good competitor at the same time

C. Mangroves and lichens are good stress tolerant and also good adopted to disturbance

D. Many perennial herbs are good adapted to habitat disturbance, but these are less competitor 

Which one of the following options represents a combination of correct statements?

#Question id: 10602

#Unit 10. Ecological Principles

What are size of female population of butterfly (Breed once and one year life span ) after two year ?

Nt = 20 (initial population ) Nt+2 =?

Ro=1.5 number of female produced per female per generation