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
sveta [45]
3 years ago
5

Some protists, like the paramecium pictured, live in freshwater. Paramecium have contractile vacuoles, which act to pump water o

ut of the cell. Why?
A. There is a lower solute concentration inside so water is moving into the cell constantly
B. There is a higher solute concentration inside so water is moving into the cell constantly
C. There is a lower solute concentration inside so water is moving out of the cell constantly
D. There is a higher solute concentration inside so water is moving out of the cell constantly
Biology
1 answer:
Gnom [1K]3 years ago
8 0

The correct answer is option B, that is, there is a higher solute concentration inside so water is moving into the cell constantly.  

The contractile vacuole functions to pump out an extra amount of water from the cell. Paramecium lives in freshwater, where the water exhibits lower solute concentration in comparison to the cytoplasm within the cell. Therefore, due to osmosis, the water will flow within the cell.

The extra amount of water can be accumulated at the contractile vacuole and then be withdrawn out. The frequency and rhythm of the contraction rely on the surrounding and also on the number of contractile vacuoles present.  


You might be interested in
What are at least three differences between apes and humans in the cranium and teeth?
Mama L [17]
 The following are key characteristics of ape skulls that human skulls do not have:

(1) Prognathic Jaws: A chimpanzee’s maxilla (upper jaw) and mandible (lower jaw) protrude significantly. Typically, the bone from the nose to the tip of upper teeth extrudes out at about a 45 degree angle, whereas a line drawn from the nose to the chin of a typical human is vertical or concave.

(2) Large Brow Ridges above the eye sockets. Humans have negligible brow ridges.

(3) Absent or small laid back forehead: Apes lack significant vertical foreheads. Humans have large vertical foreheads, which provide room for the much larger frontal lobeof our brains. This is an important difference, as the large frontal lobe of the human brain allows us the ability to make decisions and solve problems. It also controls our behaviors, voluntary movements, emotions, and consciousness. Without a forehead, an animal would not have room for a large frontal lobe, and could not perform functions that differentiate animals from humans. The ability to make tools, improve on them, and the ability to remember how to make them, wouldn’t be possible without a forehead and large frontal lobe.

(4) Small Ovoid or Flat Cranium that houses their much smaller brains. Human adult craniums are about two to three times the volume of ape craniums. Ape craniums are narrower than the lateral extents of the eye sockets, whilst human craniums are far wider then the outer extend of their eye sockets. 

8 0
3 years ago
How do the roots and stem take part in the transport of water in a plant?
jekas [21]

Answer:

The answer is Below!!

Explanation:

Osmosis in roots leads to water moving into root hair cells. Once water moves into the root hair cells, it can travel throughout the plant. Water first makes its way to the root cortex and passes through the endodermis. Once there, it can access the xylem tubes and allow for water transportation in plants.

Hope I Helped!!

:)

7 0
2 years ago
Why is a large heavy exoskeleton less limiting for arthropods that live in water?
horrorfan [7]
5000 is the answer
....
5 0
3 years ago
What is the normal respiration rate for horses, in breaths per minute?
Papessa [141]
It depends if it is an adult, newborn or older foals
6 0
3 years ago
Which statement describes how pioneer species and climax communities are different?
Lorico [155]

Answer: D). Primary species have large numbers of offsprings, and climax communities contain species that have small numbers of offsprings.

An ecological succession is a process of gradual changes occurs in a biological community with respect to changes in the non-living abiotic factors  (water, air and sunlight) and with respect to time until the ecosystem attains stability. Primary or pioneer species are the species which invade the previously barren and primitive landmass for their survival. These species make the environment suitable for the growth of other species. These grow and develop in the initial stages of succession. These species are simple organisms which reproduce asexually and produces large number of offsprings. Examples are lichen and moss. Lichen grows on the surface of rocks and acids released by them causes withering of rocks into soil which facilitate the growth of mosses and other plants. Climax community develops in an ecosystem after replacing many previously inhabiting species. Climax community develops in the end of the ecological succession. It contains species which are highly complex and uses sexual reproduction for the production of offsprings which are less in number as compared to those produced by pioneer species by asexual reproduction.  

8 0
3 years ago
Read 2 more answers
Other questions:
  • The four nitrogenous bases found in DNA are cytosine, thymine, adenine, and deoxyribose sugar.
    9·2 answers
  • Four floral organs of a complete flower
    6·1 answer
  • What is the North American beavers scientific name
    12·2 answers
  • Proteins are considered biological polymers because they contain repeating units of amino acids.
    15·1 answer
  • If a 160lb individual has 28% body fat how much of their body weight is fat in lbs.?
    15·1 answer
  • Explain the importance of decomposrs to the overall biogechemical cycle
    11·1 answer
  • Which explains why few animal species live in a fast-flowing river? Question 2 options: Cold water lowers dissolved oxygen level
    9·2 answers
  • What is the difference between the central nervous system and the peripheral nervous system?
    6·1 answer
  • How can understanding gene expression(protein synthesis) impact our lives?
    8·1 answer
  • Can someone please help me lol thanks! NO LINKS PLEASE!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!