In the higher excited state, chlorophyll is extremely unstable; it rapidly gives up some of its energy to the surroundings as heat, and enters the lowest excited state, the excited chlorophyll has four alternative pathways for disposing of its available energy: fluorescence, Heat loss, energy transfer, photochemistry; all process takes place in which wavelength,

#Question id: 12929

#Unit 13. Methods in Biology

#Question id: 11713

#Unit 9. Diversity of Life Forms

Theoretically, which two of the following present the richest potential sources of silica?

1.  marine sediments consisting of foram tests

2.  marine sediments consisting of diatom cases (valves)

3.  marine sediments consisting of radiolarian shells

4.  marine sediments consisting of dinoflagellate plates

#Question id: 3554

#Unit 8. Inheritance Biology

The diploid cell with 6 pairs of chromosomes can divide. How many possible different combinations of maternal and paternal chromosomes in metaphase?

#Question id: 5682

#Unit 5. Developmental Biology

During prevention of polyspermy in sea urchin the shift from ___1___ to __2____is the result of a small influx of Na+ into the egg through newly opened sodium channels. Sperm cannot fuse with egg cell membranes that have a ___3___ resting potential, so the shift means that no more sperm can fuse to the egg.

#Question id: 155

#Unit 1. Molecules and their Interaction Relevant to Biology

Which amino acids are linked in phenylalanylglycine?