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
Nadusha1986 [10]
3 years ago
9

What problem is faced by organisms that live in fresh water?

Biology
1 answer:
muminat3 years ago
7 0

Answer:

A. Their bodies tend to take in too much water.

Explanation:

Osmoregulation is the maintenance of osmotic concentration inside the body cells and in the extracellular fluid by controlling the amount of water and salts.  Organisms living in water can be divided into two groups: Some are osmoconformers which change the osmolarity of body fluids with respect to the surrounding medium. Some are osmoregulators which do not allow change in internal osmolarity and try to maintain it by various means.

If as osmoregulator is placed in fresh water environment then their body is hypertonic to their environment. Osmosis will occur which is the movement of water from low solute to high solute concentration. Thus the problems faced by such organisms would be:

- Entry of excess water

- Loss of body salts to outside.

Adaptations in such organisms would be:

- Body cover such as scales or adipose covers

- They do not drink more water

- Excess water is eliminated as dilute urine

- Special cells called ionocytes or chloride cells help in active uptake of sodium ions and chloride ions.

You might be interested in
Explain how fertilization produces a new individual
alex41 [277]

Answer:

Explanation:

Egg and sperm join together and the resulting fertilized egg contains all the information needed to grow into a new individual.

3 0
3 years ago
Read 2 more answers
TIME REMAINING 51:02 Between 1940 and 1970 most scientists were already concerned about global warming. Please select the best a
Iteru [2.4K]

Answer:

False

Explanation:

Most scientists were not yet concerned about global warming. This was because the major issue during the period between 1940 and 1970 was global cooling with little or no attention on global warming.

However things started to change due to more pollution as a result of technological advances. Global warming started becoming a concern between 1970s and 1990s because of the increase in steady surface temperature.

3 0
3 years ago
Nstead of defining life, scientists have decided to _____.
miss Akunina [59]
They have to describe the characteristics of life hope this helps.
4 0
3 years ago
What are keystone species?
liq [111]

Answer:

A species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.

Explanation:

.Some examples : Sea Otter. The sea otter (shown below) is considered a keystone species as their consumption of sea urchins, preventing the destruction of kelp forests caused by the sea urchin population. ...

.Large Mammalian Predators. ...

.Sea Star

5 0
4 years ago
Hemophilia is caused by _____.
mixer [17]
A recessive allele on the X chromosome.
4 0
3 years ago
Other questions:
  • Describe the steps in bactieria reproduction
    13·1 answer
  • Materials are transported within a single celled organism by what
    5·2 answers
  • Describe the structural differences between saturated and unsaturated fats.
    6·1 answer
  • How long can yogurt be left out at room temperature?
    14·1 answer
  • Which of the following statements regarding mercury is TRUE? Mercury is a mild toxin and produces no long lasting side effects.
    6·1 answer
  • You are a geneticist trying to develop a sunflower with red flowers and a short stem. as you compare the sunflowers you have, wh
    9·1 answer
  • 3. What causes genetic variation? Select all that apply.
    8·2 answers
  • Where does skin color come from? Include the name of the molecule and the cell that is responsible.
    8·2 answers
  • How can a change in biotic factors change the population of an organism? Use the words limiting factor in your response.
    11·1 answer
  • Family programs help reduce <br> rates.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!