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
Minchanka [31]
3 years ago
6

Consider an experiment in which starch is dissolved in a liter of water. Some of the solution is placed into a securely tied dia

lysis bag. The dialysis bag is placed into a beaker containing distilled water and iodine for 30 minutes. What are the correct answers for the questions below? (Note: Iodine reacts with starch to create a black/purple color.)
What would happen to the color of the solution in the bag?
a. The solution in the bag would turn purple as the iodine reacts with the starch.
b. The solution in the bag would grow lighter as the starch leaves the bag and enters distilled water and iodine.

Would there be a color change in the water-iodine solution?
a. The water iodine solution has no color change.
b. The water iodine solution turns purple.

How do substances enter or leave the dialysis bag?
a. The dialysis bag is permeable to iodine so it can move into the bag but is not permeable to starch.
b. There is a leak in the bag allowing starch to flow out.

How would the mass of the bag change after a few hours?
a. The mass of the bag would be lighter as starch leaks out.
b. After several hours, the mass of the bag should increase as water moves by osmosis from the lower concentration outside the bag to the higher concentration (hypertonic solution).
Biology
1 answer:
disa [49]3 years ago
5 0

Answer:

yes i need this tooo

Explanation:

You might be interested in
Question 28<br> Use specific examples to compare and contrast the flow of energy and nutrients.
Stolb23 [73]

Answer:

nn  n

Explanation:

7 0
2 years ago
The number of pythons found throughout Everglades National Park
Pie

Answer:

The pythons could prey on native organisms and cause native population

to decline

Explanation:

I did this already so i know

5 0
3 years ago
HELP WILL GIVE BRANLIEST!Can all animals regenerate? Explain.
vredina [299]

Answer:

Almost all the animals can heal wounds, but only some can regenerate. One hypothesis is that certain regeneration-specific genes are expressed exclusively in regenerative species and evolutionarily lost in nonregenerative species.

Explanation:

Good luck and have a great day!

3 0
3 years ago
(-4) + (-4) + 6+6+5 + 5 ​
Licemer1 [7]

Answer: 14

Explanation:

(-4) + (-4) + 6+6+5 + 5 ​

Recall that BODMAS rule must be obeyed

Address bracket first, and note that plus sign multiplied by minus sign becomes minus

so, (-4 - 4) + 6+6+5 + 5

(-8) + 6+6+5 + 5 ​

= (-8) + 6+6+5 + 5 ​

= (-8) + 22

= 14

Thus, the answer is 14

7 0
3 years ago
Read 2 more answers
An anthropologist compares the remains of Homo neaderthalensis to earlier hominid species, like Homo habilis, and to the contemp
galina1969 [7]

Answer:

The incorrect conclusion is D that is finding burial sites of <em>Homo habilis </em>on different countries.

Explanation:

<em>Homo habilis</em> are called as stone age human that are appeared  between 2.1 and 1.5 million years ago and they use tools that are made up of stone which they use to kill the animals. They are called as scavengers and they didn't have any knowledge about bury the dead bodies.

<em>Homo neanderthalensis</em> are the extinct species of human that appears at about 40,000 years ago who bury the dead body but they became extinct due to competition and they did't able to adopt the modern techniques.This was the prime factor that they became extinct.

3 0
3 years ago
Read 2 more answers
Other questions:
  • At what position will the moon phase show in diagram 2?
    14·2 answers
  • Which of these is not a virus?
    9·2 answers
  • What is the spinal cord made up of?
    7·2 answers
  • Conservation of Energy Essay
    6·1 answer
  • SOMEONE HELP ME PLZ!!!!!!!!!!!!
    10·2 answers
  • Genome is to individual, as _____________ is to population:
    13·1 answer
  • PLEASE HELP PLEASE PLEASE
    7·1 answer
  • In which beaker were the particles moving the most slowly?
    11·1 answer
  • Name 4 things that happen during telophase.
    6·2 answers
  • As you study two closely related predatory insect species, the two-spot and the three-spot avenger beetles, you notice that each
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!