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
alisha [4.7K]
2 years ago
7

What are you testing for when you use lugols solution

Biology
1 answer:
Dominik [7]2 years ago
7 0

You are testing for the presence of starch: Iodine dissolved in an aqueous solution of potassium iodide - reacts with starch producing a deep blue-black color. This reaction is the result of the formation of polyiodide chains from the reaction of starch and iodine.

You might be interested in
Which statement is true for both plant and animals cells?
bulgar [2K]

Answer:

Nuclei and vacuole

Explanation:

But in animal cell vacuole are temporary exist

3 0
2 years ago
DDT is a synthetic compound commonly used as an insecticide. It was used to control mosquito species that commonly spread diseas
fenix001 [56]

Answer:

The phenomenon that explains the trend seen in the data is that the mosquitoes' evolution has led them to develop resistance to the compound.

Explanation:

This is a very common factor that we can see in insects. The effect of DDT on the species will have different levels of impact. One is going to be more vulnerable to the compound that the rest. However, after many times of exposition to the compound, a few survivors will develop resistance to the compound and their offspring is going to inherit that resistance. Making them increase the resistance over time.

3 0
3 years ago
What is the effect of the presence of double bonds in plant lipids?
Anna71 [15]

Answer: Option C.

C)the tails of plant lipids cannot pack as tightly together as animal ones

Explanation:

The tails of plant lipids cannot pack as tightly together as animal ones because the double bond in plant lipids make the hydrocarbon chains to bend making them no to pack tightly together which cause a reduction in van der Waals interaction between the fatty acids. The length of the double bond also affect the melting point of fatty acids . If the hydrocarbon chain is long, melting point will be high .

7 0
2 years ago
In the past 250 years how many volcanoes have erupted?
lesya [120]

Answer:

Graph showing known historically active volcanoes, number of volcanoes reported to be active each year, and population. The line labeled "Known Historically Active Volcanoes" (right scale) is the cumulative number of volcanoes with an historically recorded eruption by that year. "Volcanoes Active Per Year" since 1400 CE (black line) and 10-year running mean of same data (thick red line) is also based on reported eruptions (those with uncertainty dates greater than 1 year are not included, nor are uncertain eruptions). "Population" (right scale) is the world's estimated human population; data from McEvedy and Jones (1978) and (since 1750) Population Reference Bureau, Washington, D.C. See text for further explanation.

A dramatic increase in both the number of historically active volcanoes and recorded eruptions took place about 1500 CE. These resulted in part from the great Spanish/Portuguese marine explorations – the Age of Discovery – around the end of the 15th century, when explorers opened Latin America and much of the western Pacific to European record-keeping. Perhaps equally important was the development and widespread distribution of the printing press in the late 15th century, markedly increasing the likelihood that new volcanological records would survive. Through the 17th and into the early 18th century the recognition of additional active volcanoes generally corresponded with steadily increasing eruption reports. By the 18th century global trade was flourishing, the Industrial Revolution was under way, and the heightened reporting of eruptions noticeably accelerated the discovery of new volcanoes. The list has continued to grow, with several important volcanic regions such as New Zealand, Alaska, and Hawaii being unrepresented until the last 250 years.

Explanation:

please mark me as brainlest answer hope this helps

4 0
2 years ago
The graph to the right represents the data of this
bogdanovich [222]

Answer:

Bar Graph

Blue

Orange

Explanation:

On Edge2020

7 0
3 years ago
Read 2 more answers
Other questions:
  • The most numerous types of interest groups in the united states are
    11·2 answers
  • Mesopotamian civilizations developed in the fertile valley between the Tigris and Euphrates rivers. This valley would be conside
    7·2 answers
  • How many Coronavirus strains are in the World and tell me 3 Names of the strains​
    8·1 answer
  • An organism must have a ________ in order to be considered living.
    7·1 answer
  • State the difference between osmosis and active transport
    10·1 answer
  • What is one reason water can remain in the liquid state on Earth?
    13·1 answer
  • Why did the removal of wolves affect the entire Yellowstone ecosystem?
    10·2 answers
  • Boild water is it convection radiation cunduction or convection
    7·1 answer
  • Ribosomal subunits are large complexes composed of numerous polypeptides and at least one rrna molecule. Which subunits include
    9·1 answer
  • Nitrogen-fixing bacteria make ammonia from nitrogen gas .target 1 of 4target 2 of 4 Ammonifying bacteria make amino acids from a
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!