In a field experiment, autotrophs are provided a 14C-labelled carbon compound for photosynthesis. Radioactivity (14C) levels were then monitored at regular intervals in all the trophic levels. In which ecosystem is the radioactivity likely to be detected in longer time at the higher trophic level?

TLS Online TPP Program

#Question id: 27358

#Unit 6. System Physiology – Plant

Choose the correct statement regarding singlet and triplet state

1. singlet state is short lived, net angular momentum and spin quantum number, s is zero

2. singlet state is long lived, net angular momentum and spin quantum number, s is one

3. Triplet state is long lived , net angular momentum and spin quantum number, s is one

4. Triplet state is short lived net angular momentum and spin quantum number, s is zero

TLS Online TPP Program

#Question id: 29538

#Unit 6. System Physiology – Plant

Phytoalexins are low molecular weight, lipophilic antimicrobial compounds for which phenylalanine is a substrate used by

TLS Online TPP Program

#Question id: 12756

#Unit 10. Ecological Principles

Flycatcher birds that migrate from Africa to Europe feed their nestlings mostly with moth caterpillars. The data presented show the mean dates of egg laying, hatching, and fledging of flycatcher young, and the 1980 and 2000 peak mass of caterpillars.

The most likely cause for the shift in caterpillar peak mass is

TLS Online TPP Program

#Question id: 941

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is an amide-containing amino acid?

TLS Online TPP Program

#Question id: 411

#Unit 1. Molecules and their Interaction Relevant to Biology

The reaction ATP -> ADP + Pi is an example of a reaction.