1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
svp [43]
3 years ago
11

Why is it necessary to rinse the inside of erlenmeyer flask with di water periodically?

Biology
1 answer:
qaws [65]3 years ago
8 0
Hi there!

It is necessary to rinse the inside of an Erlenmeyer flask with deionized water periodically to wash the flask without adding ions which could affect the titration. 

If you wash an Erlenmeyer flask with regular tap water, you are adding ions, like sodium or chlorine, which could make you miss the equivalence point by only tenths of mL (that's a big difference when titrating). This is why when washing you use deionized water to clean the flask while ensuring that your titration is accurate.

Have a good day!
You might be interested in
What is the relationship between genes DNA and proteins
Law Incorporation [45]

Answer:

Although you might have heard people talk about a gene for red hair, green eyes or other characteristics, it's important to remember that genes code for proteins, not traits. While your genetic makeup does indeed determine physical traits like eye color, hair color and so forth, your genes affect these traits indirectly by way of the proteins created via DNA.

Hopefully, this answer helped! :D

8 0
3 years ago
Read 2 more answers
4. DNA typing was first described in 1985 by English geneticist
irga5000 [103]

Answer:

2. Alec Jeffreys

Explanation:

'DNA fingerprinting' or DNA typing (profiling) as it is now known, was first described in 1985 by an English geneticist named Alec Jeffreys. Dr. Jeffreys found that certain regions of DNA contained DNA sequences that were repeated over and over again next to each other.

3 0
3 years ago
What is quadrat sampling
xxMikexx [17]

Answer:

Quadrat sampling is a method by which organisms in a certain proportion of the. habitat are counted directly. It is used to estimate population abundance, density, frequency and. distribution. The quadrat position are chosen randomly or they are placed along a transect.

Explanation:

7 0
3 years ago
After fertilization a zygote forms. The cells then go through mitosis. Explain how this bundle of cells eventually forms a human
yaroslaw [1]

Answer:

Human fertilization and development

Fertilization is the process in which haploid gametes fuse to form a diploid cell called a zygote. To ensure that each zygote has the correct number of chromosomes, only one sperm can fuse with one egg.

Stages of human development

Zygotic stage: The zygote is formed when the male gamete (sperm) and female gamete (egg) fuse.

Blastocyst stage: The single-celled zygote begins to divide into a solid ball of cells. Then, it becomes a hollow ball of cells called a blastocyst, attaching to the lining of the mother's uterus.

Embryonic stage: The major internal organs and external features begin to emerge, forming an embryo. In this stage, the heart, brain, and spinal cord become visible. Arms and legs start to develop.

Fetal stage: Once the formed features of the embryo begin to grow and develop, the organism is considered a fetus. Differentiation and specialization of structures happens during this time.

Development overview showing the progression from zygote to blastocyst to embryo to fetus.

Development overview showing the progression from zygote to blastocyst to embryo to fetus.

Differentiation and apoptosis

During development, the number of cells must increase through division so that body axes, tissues, organs, and structures must form. Individual cells become specialized in their structure and function through the process of cell differentiation.

Unnecessary cells also must be removed in order to help form important structures. This occurs is through the process of apoptosis. For example, human hands start out as a paddle-like block of tissue. Eventually, the block was “carved” into fingers by apoptosis of the cells in between the developing fingers.

Microscope images from a scientific paper, showing a developing mouse paw. The cells between the developing digits are stained by a marker that indicates apoptotic cells.

Explanation:

8 0
2 years ago
He made a baby quilt that was 3 feet wide its perimeter was 16 ft what was its area
VikaD [51]
Answer:
15
Explanation: we know the width is 3 so we have two widths that are 3 and make up 6, 16-6=10
10/2=5 for both lengths. We only need one length and one width 3x5=15
5 0
3 years ago
Other questions:
  • What is 1 through 4 because I don't understand it
    13·1 answer
  • What is one biotic factor that affects the size of a population in an ecosystem?
    13·2 answers
  • Which state of matter does this model represent?<br> Solid<br> Liquid<br> Gas<br> Plasma
    13·1 answer
  • How are different types of microscopes used as science tools.
    11·1 answer
  • Bacteria cells have a rigid cell ____ that gives it its shape
    12·1 answer
  • According to the mohs hardness scale shown on the left, which mineral can scratch fluorite but be scratched by quarts
    8·2 answers
  • Explain why glycogen makes a good storage molecule
    14·1 answer
  • True or False :<br> The color Marketing Group (CMG) has no influence on the floral industry
    8·1 answer
  • PLEASE HELP EXAM IN PROGRESS
    12·1 answer
  • What is the law of conservation of energy?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!