# biology help please!! about population growth of yeast cell?

The population was sampled every hour for 21 hours and the results of the estimated population size were recorded in the table below.

Time (hour)Number of yeast cells

0 2

1 10

2 15

3 20

4 40

5 60

6 100

7 190

8 260

9 350

10 450

11 530

12 580

13 600

14 600

15 600

16 600

17 600

18 600

19 600

20 600

a) Identify the three distinct phases.

b)What population growth model does the population appear to follow? Write out the mathematical equation it follows.

What appears to be the carrying capacity of the container for this species of yeast?

### 2 Answers

- Anonymous8 years agoFavorite Answer
The best way to answer this question is to graph the data points.

a. lag phase is from 0 hours to about 4 hours. the exponential phases occurs from 4 hours to 12 hours. the stationary phase is from 12 to 20 hours. i guess theres not a death phase.

b. This exhibits exponential growth. # of cells at time t = initial amount of cell * e ^ rate * time

the population of yeast cells cannot go beyond 600; this is the carrying capacity.

- morantLv 44 years ago
Molasses includes sugar, and yeast desires sugar to develop. Yeast metabolizes specific sugars extra effective than others, and molasses includes severe quantities of sucrose, fructose and glucose. So yeast ferments interior the molasses and produces CO2.