On the basis of isotopic labeling and metabolite identification, oxidative pathways are more likely to be involved in the controlled degradation of IAA by____

Statement-I ___IAA is oxidized without decarboxylation to OxIAA

Statement-II___ IAA-aspartate conjugate is oxidized first to the intermediate dioxindole-3-acetylaspartate, and then to OxIAA

#Question id: 10656

#Unit 10. Ecological Principles

Which of the following is an incorrect statement about the regulation of populations?

A) The logistic equation reflects the effect of density independent factors, which can ultimately stabilize populations around the carrying capacity.

B) Density-independent factors have an increasingly greater effect as a population’s density increases.

C) High densities in a population may cause physiological changes that inhibit reproduction.

D) Because of the overlapping nature of population-regulating factors, it is often difficult to precisely determine their cause-and-effect relationships.

#Question id: 10657

#Unit 10. Ecological Principles

Assuming these age-structure diagrams describe human populations, in which population is unemployment likely to be a societal issue in the future?

#Question id: 10658

#Unit 10. Ecological Principles

The accompanying figure shows population growth pattern for two species in the same habitat

Which of the following conclusions hold true?

#Question id: 10659

#Unit 10. Ecological Principles

Ecological and crude density of fish prey in related with predator. Water level is drop during the dry season and further increases in a rainy season. Following some observation effect are present on their density

 A) Ecological density is not change with respect to water level       

 B) Ecological density is gradually decrease with low water level

 C) Crude density increases over ecological density during low water level             

 D) Ecological density increases while crude density decreases during low water level

 E) There is no effect on crude density with seasonal water level

 Which of the following above observation is correct?

#Question id: 10660

#Unit 10. Ecological Principles

Given below are growth equations where dN/dt is defined as

A.  rN

B. rN[(K-N)/N]

With reference to the above equations, which one of the following statements is incorrect?

#Question id: 10661

#Unit 10. Ecological Principles

Semelparous species are those that produce all of their offspring in a single reproductive event. The survivorship curve of a population of a semelparous species would most likely resemble which of the following?