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Kryger [21]
3 years ago
11

Which definition is the best for “semipermeable membrane”? It is a barrier that prevents materials from moving from one side to

the other. It is a barrier that allows materials to move freely from one side to the other. It is a barrier with tiny openings that let some, but not all, materials pass through. It is a barrier that helps materials move from one side to the other.
Biology
2 answers:
WINSTONCH [101]3 years ago
6 0
A semipermeable membrane is a membrane that allows certain substances to pass through it. The most accurate definition is the third choice, "It is a barrier with tiny openings that let some, but not all, materials pass through." hope this helps:)
tigry1 [53]3 years ago
3 0

Answer:

Option C, It is a barrier with tiny openings that let some, but not all, materials pass through

Explanation:

A semipermeable membrane is a biological membrane that allows some substances to pass through it. Such type of membranes are also referred as selectively permeable membrane as they do not allow all substances to pass through it non-distinctively.

For example the cell membrane , wall of arteries, wall of intestine etc.  are semipermeable membrane.

Hence, option C is correct.

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Which of the following are ways that DNA can undergo mutation? A. During DNA replication, the wrong base is added to the strand
trasher [3.6K]

Answer: Option C.

High-energy waves like UV light or radiation physically damage the DNA

Explanation:

Mutation is the change or alteration that occur in the DNA sequence or nucleotides sequence of an organism which is caused by mistakes when the organism is copied or environmental factors such as UV light.

Ultraviolet light cause mutations by activating the SOS repair systemof which is a part of i a new DNA polymerase that has no power to edit e but has the ability to move past the thymine dimer and synthesize DNA, This lead to cells able to replicate but with a high frequency of mutations.

7 0
3 years ago
Can someone plz help me?
Ber [7]

Answer:

C. all living things are made of one or more cells.

Explanation:

Sounds like it.

8 0
3 years ago
Explain the process of cross-pollination.
Anna007 [38]

Cross pollination is the transfer of pollen of different species to stigma of different species of plants.

Cross pollination results in healthy, viable and diverse plants.

Mendel observed that traits could either be dominant or recessive.

Blended traits or incomplete dominance is the condition in which dominant allele could not produce its trait alone instead blending with recessive allele takes place giving new phenotype to progeny.

Explanation:

In cross pollination pollen transfer takes place from anthers to stigma. In Mendelian genetics the anthers of the plant was removed because it has both male and female parts on same plant so that self pollination does not take place.

The importance of cross pollination is that it creates diversity in the plant species since the traits having different alleles are combined to form the progeny plant. The offspring are healthier and high quality seeds are found.

Mendel observed that traits are either dominant or recessive in general.  It was observed that when homozygous parents were crossed, the progeny in F1 generation always had dominant trait. The recessive trait only appeared when F1 generation offspring were self pollinate.

Blended traits or incomplete dominance appear when alleles get blended and exhibit the traits in phenotype. The phenotype appeared will not be matching with either parents.

The example is a white coloured flower is crossed with red colour flower the resultant colour of the flower is pink. It shows that dominant allele red is not completely dominant and gets blended with white colour.

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The Magnetosphere Is Invisible. The Aurora Borealis (Northern Lights) Is The Evidence Of The Magnetophere.
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The answer is true can you tell me answer my question
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3 years ago
Which mechanism do sponges possess that makes a predator think twice before attacking it?
VikaD [51]
<span>Sponges possess the defense mechanism of releasing toxins that make a predator</span>
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3 years ago
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