Question

Answer three questions

A plant cell with a Psi S of 0/.65 MPa maintains constant volume when bathed in a solution that has a Psi S of 0.30 MPa and is an open container. Calculate the cell's Psi P. If Psi P = 0.3 MPa and Psi S = 0.45 MPa. calculate Psi. A plant population produces many seeds that If a population of plants is currently 30 individuals, and rmax= 12 plants/month, the carrying capacity is in meadow is 40 plants. What is their dN/dt in this logistic growth situation?

Answer 1

3. It does not matter what the reading of solute potential is as in an open container the pressure potential will always be zero. Hence the answer is zero.

4. the total water potential of the system is the sum of pressure potential and solute potential. Hence you will add the pressure potential value and the solute potential value. 0.3 + (-0.45)= - 0.15 MPa is the answer.

5. dN/dt= rN x (1-(N/K)

hence calculating 12 x 30 (1-30/40)= 90 individuals/month