#Question id: 10906
#Unit 6. System Physiology – Plant
The pressure-flow model explains phloem translocation as a flow of solution (bulk flow) driven by an osmotically generated pressure gradient between source and sink.
a) Phloem translocation, both active and passive mechanisms were considered. All theories, both active and passive, assume an energy requirement in both sources and sinks.
b) In sources, energy is necessary to move photosynthate from producing cells into the sieve elements. This movement of photosynthate is called phloem loading.
c) In sinks, energy is essential for some aspects of movement from sieve elements to sink cells, which store or metabolize the sugar. This movement of photosynthate from sieve elements to sink cells is called phloem unloading.
d) The Active mechanisms of phloem transport further assume that energy is required in the sieve elements of the path between sources and sinks simply to maintain structures.
From the given statements find out the correct for pressure-flow model.
#Question id: 2473
#Unit 2. Cellular Organization
A microtubule protofilament is formed by the:
#Question id: 10826
#Unit 10. Ecological Principles
Gause's principle of competitive exclusion is, essentially,
#Question id: 27358
#Unit 6. System Physiology – Plant
#Question id: 10143
#Unit 6. System Physiology – Plant
In the carbon assimilation reaction of photosynthesis, the biosynthesis of 1 molecules of glucose from the 6 molecules of carbon dioxide requires;