#Question id: 22956
#Unit 5. Developmental Biology
#Question id: 10905
#Unit 6. System Physiology – Plant
The rate of movement of materials in the sieve
elements can be expressed in two ways: as velocity, or as mass transfer rate.
In early publications reporting on rates of transport in the phloem, what is
the velocity and the mass transfer rate?
i)
velocity-centimeters per hour (cm h-1) and mass transfer- grams per
hour per square centimeter (g h-1 cm-2)
ii)
velocity-the linear distance traveled per unit time and mass transfer rate-the
quantity of material passing through a given cross section of phloem or sieve
elements per unit time.
iii) velocity- the
quantity of material passing through a given cross section of phloem or sieve
elements per unit time and mass transfer rate- the linear distance traveled per
unit time
iv) velocity- per hour per square centimeter (h-1 cm-2) and mass transfer- kg centimeters per hour (cm h-1)
#Question id: 11538
#Unit 7. System Physiology – Animal
Prostaglandins are local regulators whose chemical structure is derived from ________.
#Question id: 28098
#Unit 6. System Physiology – Plant
The biosynthesis of chlorophylls and heme begins with the synthesis of
#Question id: 768
#Unit 1. Molecules and their Interaction Relevant to Biology
MicroRNAs are important gene regulators, but the miRNAs are also regulated in turn by other RNAs. Which, if any, of the following classes of RNA are not known to contain RNAs that regulate miRNAs?