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Dafna11 [192]
3 years ago
11

Bacteria are grown in a petri dish. One side of the dish is sprayed with an antibiotic. After a week, the number of bacteria col

onies are counted on each side. What is the independent and dependent variable?
Biology
1 answer:
vladimir1956 [14]3 years ago
7 0

Answer:

In a research there are two variables independent and dependent variable. independent variable is defined as the variable which is controlled and changed in a scientific experiment and evaluate the effects on the dependent variable while the variable which are tested and measured in experiment are called dependent variable.

When antibiotic is sprayed at one side of the petri dish, the bacterial growth on that side will eventually decrease in comparison to other side.

So, the independent variable in this experiment will be antibiotic because it is used to understand the growth of bacteria by decreasing their numbers and the dependent variable in this experiment will be bacteria as they vary according to the change in independent variable that is antibiotic.

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Identify the rectangular solid that represents the cell with the smallest amount of plasma membrane per volume of cytoplasm
Xelga [282]

Answer:

Solid 1 has the smallest amount of plasma membrane per volume of cytoplasm

<em>Note: The question is incomplete. The attachment below gives the complete question</em>

Explanation:

The outermost surface of a cell is bounded by the plasma membrane which functions to maintain the integrity of the cell as well as control the movement of particles in and out of the cell.

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From the attachment below, the surface area (plasma membrane) per volume of plasma of the rectangular solids are as follows:

Solid 1: 10/2 = 5 cm⁻¹

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Solid 3: 19.0/2 = 9.5 cm⁻¹

Solid 4: 34.24/2 = 17.12 cm⁻¹

Solid 5: 65.79/2 = 32.895 cm⁻¹

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