The rate constant of a radioactive substance is 4 years ^-1. The value of half-life will be:

#Question id: 5014

#SCPH28 | Zoology

 Following geological time period and major evolutionary event?

I. Devonian                            A. Gymnosperms dominant

II. Jurassic                               B. Amphibians diversify; first reptiles

III. Carboniferous                  C. Mammals appear

IV. Triassic                           D. Seed plants appear

#Question id: 674

#SCPH06 I Botany

Proline is not often found in a-helices of proteins because it

#Question id: 2283

#SCPH01 Biochemistry

Most cells are very small. A typical eukaryotic cell, both plant and animal, will occur in which of the following size ranges?

#Question id: 11149

#I Life Science/ Life Sciences Group – I-V

The Nernst equation specifies the equilibrium potential for a particular ion. This equilibrium potential is a function of ________.

#Question id: 9158

#SCPH28 | Zoology

Coral reefs occur on the southeast coast of the United States but not at similar latitudes on the southwest coast. Differences in which of the following most likely account for this?