Answer:
option a. streak, pour
Explanation:
The best method to isolate single bacterial colonies is the "streak-plating" method.
The "streak-plate" procedure is used to isolate pure cultures of bacteria or also colonies, from mixed populations by mechanical separation. Millions of cells form a colony, they grow in a cluster on an agar plate. With this method, a mixture of cells is spread over the surface of a agar-based nutrient in a petri dish, that makes that less bacterial cells are deposited at widely separated point on the surface and, after incubation, they develop into colonies.
On the other hand, the best method to count colonies is the pour plate method. It helps to enumerate bacterial cells in a mixed sample, often used to count the number of microorganisms in those samples, which are added to a molten agar medium before its solidification occur. The result is colonies uniformly distributed throughout the solid medium when the appropriate sample dilution is plated.
1.The nucleus is often considered to be the cell's control center.
(because it contains the DNA)
2.The cytoplasm consists of everything
inside the plasma membrane of the cell.
(actually it excludes the nucleus)
3.The plasma membrane forms
a boundary between the inside and outside of the cell. - it controls what can enter and what can't!
4.The cytoskeleton is essentially a "skeleton" inside the cell..
it maintains the form of the cell
5.The
rough endoplasmic reticulum is covered with
Ribosomes -they make the proteins!
6.Lysosomes
use enzymes to break down foreign matter and dead cells.
7.plant cells cells specifically have a cell wall, a large central
vacuole, and chloroplasts.-choloplasts are only found in plants!
Answer:
buffers
Explanation:
Buffers neutralize acids and bases.
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