#Question id: 12716
#SCPH06 I Botany
#Question id: 9591
#SCPH06 I Botany
In light reaction, the funneling of excitation from the antenna system toward the reaction centre has been shown,
a.) The excited-state energy of pigments increases with distance from the reaction centre; that is, pigments closer to the reaction centre are lower in energy than those farther from the reaction centre
b.) The energy gradient ensures that excitation transfer toward the reaction centre is energetically favorable and that excitation transfer back out to the peripheral portions of the antenna is energetically unfavourable
c.) Some energy is lost as heat to the environment by this process, but under optimal conditions almost all the excitation energy absorbed in the antenna complexes can be delivered to the reaction centre
d.) The excited-state energy of pigments decreases with distance from the reaction centre
Which of the following above combination is true?
#Question id: 11133
#SCPH28 | Zoology
Which of the following statements accurately describes a feature of temperature sensation by the nervous system?
#Question id: 11274
#SCPH28 | Zoology
Assimilation efficiency (AE) is the proportion of ingested energy assimilated in to blood stream but Production efficiency (PE) is the proportion of assimilated energy that is incorporated in to biomass. Following some statement is correct?
A. Assimilation efficiencies of aquatic herbivore is greater than terrestrial herbivore
B. Production efficiencies of higher tropic level are greater than lower tropic level
C. production efficiencies of vertebrate is less than invertebrate
D. Assimilation efficiencies of Carnivore are often greater than herbivore
#Question id: 10510
#I Life Science/ Life Sciences Group – I-V
Constitutive chemical defenses are effective against many different herbivores, including insects and mammals. Hemlock (Cicuta sp.) produces which toxins that a polyacetylene prolongs the repolarization of neuronal action potentials.