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]
4 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]4 years ago
5 0

Answer:

yes i need this tooo

Explanation:

You might be interested in
How often does the sun rotate on its axis?
DedPeter [7]
That will be once every year
4 0
3 years ago
Read 2 more answers
The biological species concept is least relevant to which of the following groups of organisms?
Luba_88 [7]
<h2>b) is the correct option </h2>

Explanation:

The biological species concept defines a species as a group of individuals living in one or more populations that can potentially interbreed to produce healthy, fertile offspring

  • The biological species concept connects the idea of a species to the process of evolution
  • Because members of a species can interbreed, the species as a whole has a common gene pool, a collection of gene variants
  • In order to be considered to be a single species in the biological species concept, a group of organisms must produce healthy, fertile offspring when they interbreed
  • In some other cases, organisms of different species can mate and produce healthy offspring, but the offspring are infertile, can’t reproduce

Hence it includes the groups which are reproductively isolated so asexual fungi will be least relevant to this group

5 0
3 years ago
If you could be any animal, what would you be? And why?
natali 33 [55]

Answer:

A cat

Explanation:

Because if I were a pet cat at least someone would take care of me and I would not have to do any real things like responsibilities.

3 0
3 years ago
6. Calculate the kinetic energy of a baseball thrown by Aroldis Chapman, who holds the world record for fastest pitch. The baseb
GrogVix [38]

Answer:

D

Explanation:

=122

5 0
3 years ago
Although the foxp2 amino acid sequence is highly conserved, humans have two unique amino acids that chimpanzees don't have. thes
PolarNik [594]

The answer is language. Humans have a high degree of language acquisition and complexity compared to chimpanzees due to foxp2 proteins. Foxp2 are transcription factors that are significant in cell proliferation. The difference of 2 in 700 amino acids in the sequence makes the protein to be differentially regulated between the two species.






4 0
3 years ago
Read 2 more answers
Other questions:
  • What parts of the body are classified as connective tissue?
    6·1 answer
  • Explain why the size of your muscles is the is partly an acquired trait and partly dependent on DNA
    9·2 answers
  • Scientific explanations are evaluated by looking at new information and comparing it to older information to see if it is specif
    15·2 answers
  • Which statement best describes the components of nucleic acids?
    14·2 answers
  • Riboflavin and thiamin are important for _____ production within cells, including nervous system cells
    11·1 answer
  • Glucose metabolism is profoundly affected during pregnancy because: a. Pancreatic function in the islets of Langerhans is affect
    9·1 answer
  • A scientist viewing a cell under a microscope sees that it has a cell wall and a large number of ribosomes. Based on these obser
    7·2 answers
  • Which of the following would be the best energy source for developing countries because it is cheap and easy to obtain?
    13·1 answer
  • C cells of the thyroid gland secrete __________. C cells of the thyroid gland secrete __________. tetraiodothyronine cortisol ca
    5·1 answer
  • URGENT!!! How does body weight affect bone density?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!