In general, the hormones that regulate senescence can be divided into two basic categories based on their most commonly observed effects:

I) positive (promoting) senescence regulators and

II) negative (repressing) senescence regulators

a) Hormones involved-Ethylene, Abscisic acid (ABA)

b) Hormones involved-Brassinosteroids (BRs), Salicylic acid (SA), Jasmonic acid (JA)

c) Hormones involved-Cytokinin, Auxin, Gibberellin (GAs)

Select correct combinations from given hormones which are involved in regulators?

TLS Online TPP Program

#Question id: 26911

#Unit 10. Ecological Principles

Which of the following is the characteristics of a realized niche?

Resource utilisation more

Determine by abiotic factors

limiting the areas inhabited by their prey or  hosts

Limited their niche by the temperature

TLS Online TPP Program

#Question id: 26912

#Unit 10. Ecological Principles

Determine the correctness of the following given;  I-fundamental niche and  II-realized niche

a.Actual range of an organism in nature

b.Biotic factors 

c.Abiotic factors

d.Abundant range of an organism

TLS Online TPP Program

#Question id: 26913

#Unit 10. Ecological Principles

Metabolic rate of Ectotherm and endotherm with respect to variable temp, which of the following represented graph is correct?

TLS Online TPP Program

#Question id: 26914

#Unit 10. Ecological Principles

Some given statements about anti freezing are given;

a.some invertebrates to withstand temperatures as low as –18°C without freezing, in presence of glycoproteins

b.Sodium, potassium, or chloride ions involve to increasing  the blood freezing point, so the lack of these ions some species help to lower the blood freezing point

c.Amphibians release large amount of glucose into the blood to prevent freezing of blood in cold

d.Sodium, potassium or urea function as anti freezing in their blood

e.Glycine causes supercooling in plants

Which of the following statements about supercooling/anti freezing is correct?

TLS Online TPP Program

#Question id: 26915

#Unit 10. Ecological Principles

Cell walls allow plant cells to build up large internal hydrostatic pressures called

TLS Online TPP Program

#Question id: 26916

#Unit 10. Ecological Principles

If a plant has a fresh weight of 150 g, a dry weight of 100g, and a turgid weight of 160g, what is its relative water content?