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Anestetic [448]
2 years ago
13

How do vaccines stop the spread of a virus

Biology
1 answer:
belka [17]2 years ago
4 0
Vaccines do not always prevent the spread of a virus. Vaccines help your body fight off viruses and protect your organs, among other things. Vaccines help protect you and others by killing the virus faster but do not necessarily prevent it from spreading. Staying at home and thoroughly cleaning your home is the only way to prevent a virus from spreading.
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Why is humus important?
Sauron [17]

Answer:

D) It decreases water movement.

Explanation:

Humus is known as part of the soil formation. It is characterized by various qualities some of which include containing nutrients such as nitrogen. It is also characterized by its ability to retain water content or soil moisture. Humus is made from the decays of plants wastes such as leaves.

Hence, in this case, the correct answer is Humus is important because "It decreases water movement."

7 0
3 years ago
Read 2 more answers
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.

7 0
3 years ago
Which statement describes a BENEFIT of CORAL REEFS? A: they supply food to organisms in both rivers and ponds. B: they produce c
kirza4 [7]

Answer:

They are home to many species of fish and Marine invertebrates.

Explanation:

Coral reef refers to large underwater ecosystem which comprises of dead and living corals.

Coral reef is made up of calcium carbonate.

They serve as habitat or home for Marine animals.

They are the source of nitrogen and essential nutrients for Marine animals.

4 0
3 years ago
What is the boundary around an animal cell
ollegr [7]

Answer:

plasma membrane/ cell membrane

6 0
3 years ago
What is the best explanation for species diversifying to fill each new niche
vladimir1956 [14]

Answer:

Adaptive Radiation

4 0
3 years ago
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