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
shusha [124]
3 years ago
12

Charles darwin's theory

Biology
1 answer:
scoundrel [369]3 years ago
5 0
Darwinism<span> is a </span>theory<span> of biological evolution developed by the English naturalist </span>Charles Darwin<span> (1809–1882) and others, stating that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.</span>
You might be interested in
Compare and contrast osmotic challenges faced by animals in freshwater, marine, and terrestrial environments, and the adaptation
Gnesinka [82]

Answer:

  • Fresh water fish have higher salt contents in their bodies than in their environments.
  • Marine fishes have less salt in their bodies than their environment
  • Terrestrial organisms have the challenge of water retention due to atmospheric contact.

Explanation:

FRESH WATER OSMOREGULATION

The salt concentration in salt water fish is higher than the concentration found in its environment (fresh water). This causes water to enter into the body of the fish through osmosis and without regulating processes, the fish is bound to swell and likely burst.To compensate for this challenge, the kidney in fresh water fish produces a large amount of urine, causing them to lose salt. To ensure too salt is not lost beyond the basic requirement, chloride cells in the gills take up ions from the water which are transported into the blood.

MARINE OSMOREGULATION

In marine fishes, the challenge opposes that of fresh water fishes since salt content in this case is lower in their blood than in their environment. To address this challenge, marine fishes lose water constantly while retaining salts to lead to a build up. The water lost, is then made up for and replenished by continual drinking of seawater. The chloride cells in marine fishes works in a manner opposing that of fresh water fish, functioning to compliment the excretion of salts by the kidney.

TERRESTRIAL OSMOREGULATION

The major challenge of osmoregulation in  terrestrial organisms is water regulation in the body owing to their contact with the atmosphere.

Terrestrial organisms possess effective kidneys which enable osmoregulation. A series of processes including filtration, re-absorption and tubular secretion, enable regulation of fluids and water conservation.

Water passes out of the descending limb of the loop of Henle, leaving a more concentrated filtrate inside. Salt diffuses out from the lower, thin part of the ascending limb. In the upper, thick part of the ascending limb, salt is then actively transported into the interstitial fluid. The amount of salt in the interstitial fluid, determines how much water moves out of the descending limb i.e the saltier it gets, the more water moves out of the descending limb. This process leaves a concentrated filtrate inside, so more salt passes out. Water from the collecting ducts moves out by osmosis into this hypertonic interstitial fluid and is carried away by capillaries, achieving osmoregulation.

8 0
3 years ago
Read 2 more answers
Organisms can be classified in the same species by morphology and _____.
Lady_Fox [76]
Reproductive isolation. Species refer to the group of organisms which share common morphological features and can interbreed and produce a viable offspring. Thus, the organisms of one species are reproductively isolated from the organisms of other species
4 0
2 years ago
Which is usually the best way to present or communicate inferred data?
lana66690 [7]
It seems that you have missed the necessary options for us to choose from, but hope this answer helps. Usually, the best way to present or communicate inferred data is in a simple diagram. Hope this answers your question. Have a great day!
8 0
2 years ago
Read 2 more answers
BRAINLIEST Explain the difference between a scientific law and a scientific theory.
Gnoma [55]
A scientific theory is a theory that explains the scientist's observations, whereas a scientific law is a repeated pattern in the world that we have not sought an explanation for.
5 0
3 years ago
Read 2 more answers
Which category do you think humans belong to? Why do you think they fit in this category?
Elden [556K]

Answer: Animal

Explanation: Us humans are an animal because we don’t make our own food like plants do. We kill and eat other plants and animals.

8 0
2 years ago
Read 2 more answers
Other questions:
  • The psychologist most closely associated with the school of functionalism is
    14·1 answer
  • By how much did carbon dioxide levels increase from 1980 too 2000
    9·1 answer
  • Does voltage from deep brain stimulation damage brain tissue
    14·1 answer
  • Fill in the blank. Bacteria of viruses can cause ----------- diseases. Which are increasing in occurrences geographic area, or b
    6·1 answer
  • 6. Think and discuss: Did the changes you observed in the moth populations result from
    7·1 answer
  • Harry is driving on the interstate highway for the first time since he obtained his license. He is nervous and wants to get off
    12·1 answer
  • Describe how two abiotic factors can move into the trees in a rain forest ecosystem
    13·1 answer
  • Which organisms are the most diverse forms of life?
    9·1 answer
  • PLSSS HELP IF YOU TURLY KNOW THISSS
    5·1 answer
  • Please help!!! 50 points!! If you're not going to actually answer, please don't say anything at all. The question is in the pict
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!