The following figure is a model of seedling establishment as a function of distance from a parent tree. Initial seed density measures the number of seeds falling to the ground. Seed survivorship measures the proportion of seeds that survive to the adult stage at each distance

Which of the following factors is most likely to generate the seed survivorship curve shown? 

TLS Online TPP Program

#Question id: 12671

#Unit 6. System Physiology – Plant

When genetic changes in an entire plant population have been fixed over many generations by selective environmental pressure, those changes are referred to as,

TLS Online TPP Program

#Question id: 12711

#Unit 6. System Physiology – Plant

Various sensors monitor ROS levels in cells; an increase in ROS activates a signal transduction network. ROS scavenging is carried out by antioxidant molecules ____X_________and by antioxidant enzymes such as____Z_________

TLS Online TPP Program

#Question id: 12713

#Unit 6. System Physiology – Plant

Following are certain statements related to plants water deficit condition;

a) Inhibits Leaf Abscission

b) Enhances Root Extension into Deeper, Moist Soil

c) Limits Photosynthesis within the Chloroplast

d) decreases Resistance to Liquid-Phase Water Flow

e) Increases Wax Deposition on the Leaf Surface

f) Alters Energy Dissipation from Leaves

Which of the following combination given statements is correct 

TLS Online TPP Program

#Question id: 12714

#Unit 6. System Physiology – Plant

Physiological and biochemical perturbations in plants caused by fluctuations in the abiotic environment, given column I with environmental factor and with its effects in the form of primary effects  in column II and secondary effects  in column III

COLUMN I        (environmental factor )	COLUMN II            (primary effects)	COLUMN III         (secondary effects)
A) Water deficit	i) Hypoxia,  Anoxia	a) Membrane dysfunction
B) High temperature	ii) ROS production	b) Reduced cellular and metabolic activities, Leaf abscission, Ion cytotoxicity and Cavitation
C) Trace element toxicity	iii) Photo inhibition	c) Reduced respiration,     Fermentative metabolism,       Inadequate ATP production ,  ROS production and  Stomatal closure
D) Flooding and soil compaction	iv) Membrane destabilization	d) Inhibition of PSII repair
E) Chilling	v) Cell dehydration and Hydraulic resistance	e) Disruption of metabolism
F) High light intensity		f) Photosynthetic and respiratory inhibition, ROS production

Find out the correct combination of given above column;

TLS Online TPP Program

#Question id: 12716

#Unit 6. System Physiology – Plant

Some cis-elements of target genes, which are involved in the Signal perception of stress (Drought/salinity and cold) to activating tolerance, 

a) MYCRS/MYBRS

b) NACRS

c) bZIP

d) ABRE

e) MEKK1

These cis-elements are____

TLS Online TPP Program

#Question id: 12717

#Unit 6. System Physiology – Plant

During drought /salinity and cold tolerance performing Signal perception via signal transduction pathway in 

(1) ABA-dependent and   (2) ABA-independent manner and activating various transcriptional factor such as

a) MYC/MYB

b) ABRE

c) DREB1/DREB2

d) NAC

e) CRT

f) bZIP