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Ilya [14]
3 years ago
15

Check all the ways listed below that ensure accurate reading of volume from a graduated pipette. tapping the base of the pipette

on the table using subtraction to determine the volume dispensed making sure that you read the volume with the liquid inside the pipette at eye level reading only the final volume of liquid after dispensing ensuring that air bubbles are not in the column of liquid inside the pipette
Biology
2 answers:
zavuch27 [327]3 years ago
6 0

Answer:

  • using subtraction to determine the volume dispensed.
  • making sure that you read the volume with the liquid inside the pipette at eye level.
  • ensuring that air bubbles are not in the column of liquid inside the pipette.

Explanation:

The pipette is a widely used laboratory material, and its main function is to transport precise quantities of liquid material. They are used, for example, in various medical examinations and in the study of molecular biology. There are several types, such as the graduated pipette, the volumetric pipette, the automatic pipette and also the micropipettes (for very small amounts of liquid). Using a pipette requires careful attention not to use wrong volumes of liquid to be used. For this reason, it is correct to say that when handling a pipette we must:

  • using subtraction to determine the volume dispensed.
  • making sure that you read the volume with the liquid inside the pipette at eye level.
  • ensuring that air bubbles are not in the column of liquid inside the pipette.
nadezda [96]3 years ago
3 0

using subtraction to determine the volume dispensed

making sure that you read the volume with the liquid inside the pipette at eye level

ensuring that air bubbles are not in the column of liquid inside the pipette


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Which list represents the proposed sequence in plant evolution?​
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Explanation:

1. Bryofita

Around 475 million years ago, the origin of plants was thought to originate from aquatic ancestors (green algae). Adaptation to terrestrial life is proven by the presence of sporopolenin and layered gametangia that protect gametes and embryos. This adaptation occurs in bryophytes which are the first terrestrial plants. Bryofita or mosses develop into various vanations in their group. Most briolites do not have vascular tissue (water from the environment is diluted and absorbed by the SD, but some briophytes have water-carrying vessels.

2. Vascular plants

Around 400 million years ago, the evolution of plants was marked by the diversification of vascular plants (vascular plants). These early vascular plants are seedless plants, for example in the types of ferns seria into other groups of seedless plants.

3. Seed vascular plants (gymnosperms)

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About African elephant species and their relationship to the environment brainly.com/question/12630439#

Details

Class : Junior High

Subject : Biology

 

Keywords

- Plant

- Plant Evolution

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