Please answer fast!! Will mark BRAINLIEST!! PLEASE HURRY

laila [671]

The answer is C. Because they do have scales

5 0

3 years ago

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Describe the principal and procedure of spiral plating.

Inessa [10]

Answer and Explanation:

Principal of Spiral plating:In the spiral plate technique, a mechanical plater vaccinates the fluid sample on a pivoting plate agar. The volume of fluid sample decline from the inside to the edge of the plate. The microbial concentration is controlled by checking the provinces on a piece of the Petri dish.

A technique, portrayed for deciding the quantity of microorganisms in an solution by the utilization of a machine which stores a known volume of test on a pivoting agar plate in a consistently diminishing sum as an Archimedes spiral.

Materials used: agar plates, dilution blanks, pipettes

Method:

A spiral plater is a gadget that disperses a constantly diminishing volume of fluid over a solitary pivoting agar plate (the apportioning arm moves like a needle on a turntable, just in reverse). The agar is then hatched and checks are made. It can viably convey up to a 105 concentration range on one plate, yet list requires an uncommon tallying lattice. After the example is brooded, distinctive state densities are clear on the outside of the plate. A changed checking matrix is portrayed which relates zone of the plate of volume of test. By checking a proper territory of the plate, the quantity of microscopic organisms in the example is assessed.

6 0

3 years ago

Classify each example or description into the correct evolutionary mechanism.

svetlana [45]

Among evolutionary mechanisms, there can be mentioned non-random matings (1 and 8) , mutations (3 and 6), genetic drift (2, 4 and 5), and genetic flow (7).

<h3>What are evolutionary mechanisms?</h3>

These are different mechanisms that change allelic frequencies and genotypic frequencies conserning the expected ones if populations were under Hardy-Weinber equilibrium.

When these mechanisms are going on, populations evolve.

Among them, we can mention,