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DIA [1.3K]
3 years ago
12

A cell membrane is semipermeable which phrase best explains semipermeable

Biology
2 answers:
VARVARA [1.3K]3 years ago
6 0
"Semi" means "to<span> some extent or degree", and "permeable" means "allowing material to pass through." Combine those two meanings, and you have the definition of semipermeable.

The phrase that explains "semipermeable" is "allows some material to pass </span>through" or "is partially able to allow material to pass through." Hope this helps!
Daniel [21]3 years ago
6 0

Answer:

"Semi" means "to some extent or degree", and "permeable" means "allowing material to pass through." Combine those two meanings, and you have the definition of semipermeable.

Explanation:

edge. 2020

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Arrange the tiles to show the sequence of events in the development of the theory of evolution.
Novosadov [1.4K]

Answer:

Explanation:

Here is the summary;

In 1817 his father collected later, in1828 Alexandre Brongniart's son (Scientists) collected fossils that showed species changing over time.

Between 1831–36 Darwin collected specimens from around the world during the HMS Beagle voyage

In 1859 Darwin proposed the theory of evolution by natural selection

Between (1856-1863), published in 1865 Mendel proposed laws for how traits are inherited.

Scientists examined evolutionary relationships using DNA sequencing.

3 0
3 years ago
What two cell division processes use dna replication.
maks197457 [2]
<h2>The two cell division processes that use DNA replication are mitosis and meiosis.</h2>

7 0
2 years ago
What is the role of RNA polymerase?
LUCKY_DIMON [66]
I think the answer MIGHT be D. RNA synthesis is carried out by proteins known as RNA polymerases that transcribe the genetic information from DNA in a highly-regulated, multi-stage process. But transcribe and translate are different so I'm not a 100% sure. Hope this helps!
4 0
3 years ago
What do you know about the Punnett Square? (Don’t research it or you will not get credit for this question.)
Ivanshal [37]

Answer:

Well it says not to research so here's a brief definition: A punnet square is a diagram that shows the genotypes of a cross and helps predict the probability of having certain genotypes.

Explanation:

Heres some words to know

-Dominant

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-Allele

-Mendel's law of Heredity

Let me know if you want more explanation on these :)  

8 0
3 years ago
Read 2 more answers
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
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